Automatic Mail-Merge Document Creation Using Zoho CRM APIs

Automatic Mail-Merge Document Creation Using Zoho CRM APIs

Efficient communication and personalized document generation are crucial for maintaining strong customer relationships in your business. Manual document generation can be time-consuming, repetitive and error-prone, decreasing productivity and customer satisfaction. You can solve this with automatic document generation by creating merged documents from predefined mail merge templates.
With Zoho CRM's mail merge templates you can create personalized documents, including forms, envelopes, and letters, by utilizing variables also known as merge fields. These templates enable you to merge data from variables, ensuring accurate information is incorporated into the documents without the need for manual data entry for each record. For additional information, please consult the guidelines on Managing Mail Merge Templates. 

In Zoho CRM, you can automate document generation using its mail merge template APIs. You can send, sign, and download customized documents automatically. 
Send Mail Merge API : To send emails to users using mail merge template. You can also attach files either as inline images or separate attachments with the email through the API.
Sign Mail Merge API : To sign and approve a merged document.
Download Mail Merge API: To download a mail merged document.

Let us discuss two use cases where these APIs are used. Assume you manage your business for a technological company, Zylker Technologies, using Zoho CRM. 

Prerequisites
  • Create a connector with required scopes. For the below use cases a connector with the below scopes was created -ZohoSign.documents.ALL, ZohoCRM.modules.ALL, ZohoWriter.documentEditor.ALL, ZohoWriter.Merge.ALL, ZohoCRM.settings.mailmerge.CREATE

Use Case 1: Using Mail Merge APIs for sending Letter of Intent for customers
 Let us consider a scenario where you want to send a LOI (Letter of Intent) to be signed by your customer. A Letter of Intent is a formal document that contains a preliminary agreement and commitment to move forward with the deal, outlining key terms and conditions. You can create a mail merge template for your LOI with merge fields from your Customer module. You can find mail merge templates in Zoho CRM UI under Setup > Customization > Templates > Mail Merge. Refer the below image for a sample LOI mail merge template. 

Sample Mail Merge Template for Letter of Intent

Note that the merge fields given in the mail merge template are fields from Accounts module (renamed as Customers) with additional custom fields.
You can automate sending the LOI to your customer using a custom button with an associated function for the Customers module. In this case, a custom button "send LOI" is added as shown in the screenshot below.
Screenshot of Customer module showing sendLOI button

The below function calls sign mail merge API which sends the merged letter of intent document to your customer for signing.  The customer will receive an email notification containing the document which can be signed using Zoho Sign. Sign mail merge API's response includes a Zoho Writer document link that can be used to track the signing status. In the below function, the system will send mail to the customer along with the mail-merged document for them to sign, and it will store the link to track the sign status in a custom URL field named Document Sign Details.  This field allows you to access and review the document from your record conveniently.

customerMap = zoho.crm.getRecordById("Accounts",customerId.toLong());
name = customerMap.get("Account_Name");
to_email = customerMap.get("customer_Email");
merge_template_name = "LOI";
//Replace with your mail merge template name
info name;
info to_email;
input_json = "{'sign_mail_merge':[{'mail_merge_template':{'name':'" + merge_template_name + "'},'file_name':'letterofintent','sign_in_order':false,'signers':[{'recipient_name':'" + name + "','action_type':'sign','recipient':{'type':'email','value':'" + to_email + "'}}]}]}";
header_data = Map();
header_data.put("Content-Type","application/json");
response = invokeurl
[
url :"https://www.zohoapis.com/crm/v5/Accounts/" + customerId.toLong() + "/actions/sign_mail_merge"
type :POST
parameters:input_json
connection:"zylkercrm"
];
//Replace above connection name with your connection name
info response;
details = response.getJSON("sign_mail_merge").toJSONList();
link = "";
for each  detail in details
{
link = detail.get("details").get("report_link");
info link;
}
mp = Map();
mp.put("Document_Sign_Details",link);
update = zoho.crm.updateRecord("Accounts",customerId.toLong(),mp);
return "";

The system sends a merged document, as shown in the screenshot below, to the customer.
Final Merged Document sent to Customer

Use case 2: Using mail merge API for sending different types of SLA 
Assume that in Zylker Technologies, when you sell a product, your customer can opt for different types of after sales support . A check list field - Support Type - indicates type of support - Standard or Premium.  SLA document(Service Level Agreement) is a contract between you and your customer that defines level of service and the metrics used to measure the service.The service level provided to different customers will be different based on the kind of support they opted for and you need to send different SLA document based on this.  This can be achieved by maintaining two SLA mail merge templates. 
Similar to use case 1, a custom button can invoke the below function and in the function, a mail merge template is selected based on the type of service provided. The support_Type fields gets the value of the "Support Type" check list. Merge mail template is decided based on this field and send mail merge API is called to send the merged document. After sending the mail with appropriate mail merge template document, the function downloads the merged document and uploads it to the Attachments related list. 
Using download mail merge API, the merged document is obtained and then attached to the Contacts module with the attachFile function.


customerMap = zoho.crm.getRecordById("Accounts",customerId.toLong());
to_email = customerMap.get("customer_Email");
from_email = customerMap.get("Owner").get("email");
support_Type = customerMap.get("Support_Type");
if (support_Type == "Premium" )
{
merge_template_name = "SLA_Premium";
}
else 
{
merge_template_name = "SLA_Std";
}
//Replace above merge template names with your merge template names
input_json = "{'send_mail_merge':[{'mail_merge_template':{'name':'" + merge_template_name + "'},'from_address':{'type':'email','value':'" + from_email + "'},'to_address':[{'type':'email','value':'" + to_email + "'}],'subject':'Hi there','type':'attachment','attachment_name':'testdocument','message':'Big Deal'}]}";
header_data = Map();
header_data.put("Content-Type","application/json");
response = invokeurl
[
url :"https://www.zohoapis.com/crm/v5/Accounts/" + customerId + "/actions/send_mail_merge"
type :POST
parameters:input_json
connection:"zylkercrm"
];
//Replace above connection name with your connection name
input_json = "{'download_mail_merge':[{'mail_merge_template':{'name':'" + merge_template_name + "'},'output_format':'pdf'}]}";
header_data = Map();
header_data.put("Content-Type","application/json");
//The merged document is stored to file_object
file_object = invokeurl
[
url :"https://www.zohoapis.com/crm/v5/Accounts/" + customerId.toLong() + "/actions/download_mail_merge"
type :POST
parameters:input_json
connection:"zylkercrm"
];
//Replace above connection name with your connection name
response = zoho.crm.attachFile("Accounts",customerId,file_object);
return "";

The benefits of using the mail merge template APIs from Zoho CRM, which enable automated document generation, are highlighted in this article. These APIs enable the easy customization of the documents like Letters of Intent (LOIs), Service Level Agreements (SLAs), Request for Proposal (RFPs), etc. Businesses can increase efficiency, accuracy, and customer happiness by automating this procedure.
We hope you found this article useful. We will be back next week with another interesting topic. If you have any questions, write to us at support@zohocrm.com or let us know in the comment section. 

    Access your files securely from anywhere







                            Zoho Developer Community





                                                  Use cases

                                                  Make the most of Zoho Desk with the use cases.

                                                   
                                                    

                                                  eBooks

                                                  Download free eBooks and access a range of topics to get deeper insight on successfully using Zoho Desk.

                                                   
                                                    

                                                  Videos

                                                  Watch comprehensive videos on features and other important topics that will help you master Zoho Desk.

                                                   
                                                    

                                                  Webinar

                                                  Sign up for our webinars and learn the Zoho Desk basics, from customization to automation and more

                                                   
                                                    
                                                  • Desk Community Learning Series


                                                  • Meetups


                                                  • Ask the Experts


                                                  • Kbase


                                                  • Resources


                                                  • Glossary


                                                  • Desk Marketplace


                                                  • MVP Corner




                                                            • Sticky Posts

                                                            • Kaizen #197: Frequently Asked Questions on GraphQL APIs

                                                              🎊 Nearing 200th Kaizen Post – We want to hear from you! Do you have any questions, suggestions, or topics you would like us to cover in future posts? Your insights and suggestions help us shape future content and make this series better for everyone.
                                                            • Kaizen #198: Using Client Script for Custom Validation in Blueprint

                                                              Nearing 200th Kaizen Post – 1 More to the Big Two-Oh-Oh! Do you have any questions, suggestions, or topics you would like us to cover in future posts? Your insights and suggestions help us shape future content and make this series better for everyone.
                                                            • Celebrating 200 posts of Kaizen! Share your ideas for the milestone post

                                                              Hello Developers, We launched the Kaizen series in 2019 to share helpful content to support your Zoho CRM development journey. Staying true to its spirit—Kaizen Series: Continuous Improvement for Developer Experience—we've shared everything from FAQs
                                                            • Kaizen #193: Creating different fields in Zoho CRM through API

                                                              🎊 Nearing 200th Kaizen Post – We want to hear from you! Do you have any questions, suggestions, or topics you would like us to cover in future posts? Your insights and suggestions help us shape future content and make this series better for everyone.
                                                            • Client Script | Update - Introducing Commands in Client Script!

                                                              Have you ever wished you could trigger Client Script from contexts other than just the supported pages and events? Have you ever wanted to leverage the advantage of Client Script at your finger tip? Discover the power of Client Script - Commands! Commands


                                                            Manage your brands on social media



                                                                  Zoho TeamInbox Resources



                                                                      Zoho CRM Plus Resources

                                                                        Zoho Books Resources


                                                                          Zoho Subscriptions Resources

                                                                            Zoho Projects Resources


                                                                              Zoho Sprints Resources


                                                                                Qntrl Resources


                                                                                  Zoho Creator Resources



                                                                                      Zoho CRM Resources

                                                                                      • CRM Community Learning Series

                                                                                        CRM Community Learning Series


                                                                                      • Kaizen

                                                                                        Kaizen

                                                                                      • Functions

                                                                                        Functions

                                                                                      • Meetups

                                                                                        Meetups

                                                                                      • Kbase

                                                                                        Kbase

                                                                                      • Resources

                                                                                        Resources

                                                                                      • Digest

                                                                                        Digest

                                                                                      • CRM Marketplace

                                                                                        CRM Marketplace

                                                                                      • MVP Corner

                                                                                        MVP Corner







                                                                                          Design. Discuss. Deliver.

                                                                                          Create visually engaging stories with Zoho Show.

                                                                                          Get Started Now


                                                                                            Zoho Show Resources


                                                                                              Zoho Writer Writer

                                                                                              Get Started. Write Away!

                                                                                              Writer is a powerful online word processor, designed for collaborative work.

                                                                                                Zoho CRM コンテンツ








                                                                                                  Nederlandse Hulpbronnen


                                                                                                      ご検討中の方




                                                                                                            • Recent Topics

                                                                                                            • Add a Way to Duplicate Cards in the Same Canvas (Retain All Settings)

                                                                                                              Dear Zoho SalesIQ Team, We would like to request a new feature in Zoho SalesIQ: the ability to duplicate an existing card within the same canvas while retaining all of its information and settings, including conditions, configurations, and display preferences.
                                                                                                            • Sales IQ needs to capture both first and last names

                                                                                                              Sales IQ chat only has one field for name. When this then syncs with Campaigns, the field populates the "last name" field in Campaigns. However most people fill in the "name" field of Sales IQ with either their full name or their Christian name. This
                                                                                                            • Multi-Card Selection and Cross-Zobot Copy-Paste Functionality

                                                                                                              Dear Zoho SalesIQ Team, We’d like to suggest a productivity-enhancing feature for the Zobot builder in Zoho SalesIQ: the ability to select multiple cards (modules) at once using a selection area, and then copy-paste them either within the same canvas
                                                                                                            • Personal Link / Meeting ID

                                                                                                              with zoho meetings do I have my own personal link to my 'meeting space' ? I have an email template in Zoho CRM which confirms people's appointment with me, I would like to include the link to my Zoho Meetings so that they have it in advance. How do I
                                                                                                            • Ability to Initiate WhatsApp Template Messages in Zoho SalesIQ Without Preexisting Chat

                                                                                                              Hi Zoho SalesIQ Team, I hope you're doing well. I understand that with the WhatsApp integration in SalesIQ, clients can contact us via WhatsApp, and we can use WhatsApp templates to send messages outside of the 24-hour window by reopening an existing
                                                                                                            • Related Lists filter

                                                                                                              I have Contacts showing in our Accounts module. I customized the Contacts module with an Employment Status field, with the following picklist options: "Primary Contact", "Secondary Contact", "Active Staff(not a main contact)", and "No longer employed".
                                                                                                            • Adding Overlays to Live Stream

                                                                                                              Hello folks, The company I work for will host an online event through Zoho Webinar. I want to add an overlay (an image) at the bottom of the screen with all the sponsors' logos. Is it possible to add an image as an overlay during the live stream? If so,
                                                                                                            • Making money out of Zoho Sheets - How?

                                                                                                              Hello, Suppose I come up with a brilliant Zoho Sheet that I want to sell to other people, can I do this? How? Thanks.
                                                                                                            • How Do I Refund a Customer Directly to Their Credit Card?

                                                                                                              Hi, I use books to auto-charge my customers credit card. But when I create a credit note there doesn't seem to be a way to directly refund the amount back to their credit card. Is the only way to refund a credit note by doing it "offline" - or manually-
                                                                                                            • Mobile Display Issues on Zoho Sites After Recent Update

                                                                                                              Hello! I’m currently facing an issue with my Zoho website that I created for my small business. After the recent updates, I’ve noticed that my site is not displaying correctly on mobile devices. Specifically, the layout appears distorted, and some elements
                                                                                                            • Can i set per-client hourly rate in Zoho Desk and not to correct the calculation on invoice?

                                                                                                              We use Zoho Desk to run one ticket per client per month. All time entries go to the ticket, we have to enter hourly rate manually and then correct it when we do the invoicing at the end of the month. So, our workflow is as following: I worked for 30 minutes,
                                                                                                            • Unable to add Agents

                                                                                                              I am trying to add agents to my account. While filling the details and sending invitation, the system mentions that invitation is sent. But no email is received on the user side. I have tried this multiple times and have also checked Spam and other
                                                                                                            • How to add new widgets?

                                                                                                              Searched and searched and cannot find anywhere. Why is everything so hidden in zoho! Why is there not a button right here that allows me to create a new one, why is it buried somewhere else! Zoho's UI is so infuriating
                                                                                                            • Submit Ticket from Custom Form on Website

                                                                                                              Hi I would like to create new tickets from our custom form on our website including some custom fields like serial number. I would prefer PHP to create the ticket. I know there is the Zoho webform but we would like to create our own. I have now read into the API and with AuthToken this would work with PHP but it is deprecated  and will not be supported any more in the future, so this not an option. OauthToken on the other hand needs an interaction from the ticket creator (customer) which we would
                                                                                                            • Customising Sign Up Page in Zoho Help Centre Sandbox

                                                                                                              Hi, I would like to customise the Sign Up page in my Help Centre Sandbox Environment but when I try to access it I get this message: What setting or permission do I need to achieve this? Many thanks, Kunal
                                                                                                            • Sort data in Pivot Table

                                                                                                              Is it possible to sort by a data field. I can gruop and filter, but I culdn't find how to sort the results. Tank You.
                                                                                                            • How to interact webhooks with Creator?

                                                                                                              How can I interact webhooks from external websites with Zoho Creator?  I'd like to get notifications from external websites (Stripe, Zoho Subscription, etc.) These notifications are coming as HTTP POST request from those servers, on maybe daily, monthly or based on any events.  How should I prepare my app in creator to receive these requests? Where and how to should I program in Deluge if I'd like to add some part of the JSON/XML data to my form?  Thank you BR, Balazs
                                                                                                            • No Experiment Visitors

                                                                                                              I have an experiment running for five days. PageSense web analytics data shows the page is getting visitors, but the experiment data itself says zero visitors. I am in trial mode, not sure if that's related. A week ago, I contacted support through chat
                                                                                                            • How do I get at the data in "Partially Saved Entries"?

                                                                                                              Hi, Zoho Newbie here - I'm helping to support an existing Zoho installation, so this is all a bit new to me. I have to say, I'm liking what I've seen so far! We've just spotted that we have a number of respondents to our forms who don't end up submitting
                                                                                                            • SOLVED: Stopping Multiple Invitations when sync with Google Calendar

                                                                                                              I wanted to share this solution as I wasn't able to find it when searching through the Zoho community and via web search. The issue: When requestor books a meeting through Zoho Bookings, the requestor receives a confirmation email from both Bookings and
                                                                                                            • Help Needed with Creating Close % Reporting

                                                                                                              Now that our company has a good data set to work with we want to use ZCRM reports ways to track the performance metrics we have established. Specifically, I want to be able to calculate closing % for individual salespeople and individual support people.
                                                                                                            • Restricting Calendar View to Working Hours

                                                                                                              Hi: I'm trying to implement a calendar which displays all of my customer appointments.  Currently, the calendar shows all 24 hours of the day.  Is there a way to restrict the hours to simply the times my business is open? Thanks!
                                                                                                            • Static Prefill URLs Functionality in the App

                                                                                                              Hi, It would be great to be able to use the same functionality within the App, so create the Static Prefill URL as today and be able to use online as today, and then have an area within the App showing these Entries that can be pressed and opens the form
                                                                                                            • Outbound Gateway

                                                                                                              Hi, Is it possible to configure the Outbound Gateway to route external domains only and keep inter-domain emails locally delivered? When one of my users sends an email to another user within our own domain, I want user1@mydomain.com to user2@mydomain.com not to exit. However, if anyone within our domain sends to an external address, I want that email to be routed using the Outbound Gateway. Thanks. P.
                                                                                                            • Free Webinar : Unlock AI driven business insights with Zoho Inventory + Zoho Analytics

                                                                                                              Are you tired of switching between apps and exporting data to build customized reports? Say hello to smarter & streamlined insights! Join us for this exclusive webinar where we explore the power of the Zoho Inventory–Zoho Analytics integration. Learn
                                                                                                            • Delivery Note Delivered item must be reduce in inventory stock

                                                                                                              When I create any Delivery note with product like mobile In our stock if it was 10 Unit I sold thru invoice, 4 unit And thru Delivery note, 2 Unit and I also change Delivery note status as delivered So in my stock it should display remaining 4 unit But write now it display 6 unit only. Please help me for that Because when I creating new invoice it display 6 unit in stock but actually in my physical stock its only 4. So I miss guide with stock display
                                                                                                            • Adding bills from docs *** Internal Error ***

                                                                                                              Same internal errors in Chrome & Edge !
                                                                                                            • Response time when adding customers to the database is increasing over time.

                                                                                                              Response time when adding customers to the ZoHo books database is increasing over time. The response time to retrieve a newly added customer is now 1.5 to 2 minutes. The database has approximately 2,000 customers. I think you need to reorganise the
                                                                                                            • Excluded transactions in Banking

                                                                                                              Why are the payees not checked when 2 payments are for the same amount to avoid exclusion? If there are 2 ( or more ) payment amounts which are the same then they are automatically excluded, this should not happen unless the payee names are the same
                                                                                                            • Introducing Zia AI in Zoho Show

                                                                                                              AI is no longer a distant concept. It’s one of our everyday tools, from answering casual questions to generating critical business documents. And presentations are one area where AI can be especially helpful. At Zoho Show, we’ve been deliberate in how
                                                                                                            • Plug Sample #10 - Simplify Ticket Management (Zoho Desk) with Chatbots

                                                                                                              Hi everyone! We're here with another simple yet effective plug for your chatbot to integrate with Zoho Desk. When a customer reports an issue/request during chat, it's logged as a ticket on Desk. When they return for updates, you end up searching through
                                                                                                            • Trigger a field rule when Choice Availability reaches 0

                                                                                                              First of all, thanks for shipping the new Choice Availability counter. It solves the basic “stop over-booking” problem. What’s missing, though, is a way to react when an option is sold out. Right now we can only disable/hide the choice; we can’t fire
                                                                                                            • Unattended Access on Android without Play Store

                                                                                                              I'm testing Zoho Assist for remote config and maintenance of our IoT devices. The devices are running Android 8.1 and do NOT have Google Play Store installed, nor can it be installed. I've been able to install Zoho Assist on the devices and load the enrollment
                                                                                                            • Zoho People > Performance Management > Appraisal cycle

                                                                                                              Hello All I am using this 2 users to test out how it work on Performance Management User 1 - Reportee User 2 - Reporting Manager : Li Ting Haley User 1 : Self Appraisal Error How do i fix this error?
                                                                                                            • What's New - June 2025 | Zoho Backstage

                                                                                                              Plans change. People cancel. Tickets get handed off. It happens, and we understand. As an organizer, you need tools that offer flexibility for attendees while protecting your event’s integrity. That’s why we’ve built features to help you manage these
                                                                                                            • Include Article Sync Details in SalesIQ–Desk Integration Notification Email

                                                                                                              Dear Zoho SalesIQ Team, Greetings, We are using the integration between Zoho SalesIQ and Zoho Desk to sync articles from the Zoho Desk Knowledge Base into SalesIQ. As part of this integration, we receive the following email notification: "Your scheduled
                                                                                                            • Naming a Visitor in SalesIQ Messes up First and Last Name

                                                                                                              When I go to Visitor History to manually associate a visitor with a known contact, I press the pencil symbol next to the system-generated ID number. I enter first and last name, then email. Looks good so far. However, when it syncs with CRM, first name
                                                                                                            • Partial Sync

                                                                                                              Hi, got an issue with syncing cards across windows app, web app and iphone app. If I create a card and add some text content then everything syncs across all platforms ok. If I create a card and add an attachment, be it pdf, jpg or movie then the card
                                                                                                            • Related activity records for custom modules

                                                                                                              For default modules in CRM, whenever I create a task for a contact, the task also appears in the record for the parent account. How do I replicate this with custom modules? My specific situation is that I have a custom module as a child module to Accounts.
                                                                                                            • Why Do My Portal Users Can't See Any Data in Reports

                                                                                                              In My zoho crm i have created a button automation which basically is it converts a quote into invoice and sales order , so initially when a person who is my app user submits a quotation form it goes into quote module and record is created and in each
                                                                                                            • Next Page