Kaizen #96 Automatic Mail-Merge Document Creation Using Zoho CRM APIs

Kaizen #96 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




                                                  • Desk Community Learning Series


                                                  • Digest


                                                  • Functions


                                                  • Meetups


                                                  • Kbase


                                                  • Resources


                                                  • Glossary


                                                  • Desk Marketplace


                                                  • MVP Corner


                                                  • Word of the Day


                                                  • Ask the Experts



                                                            • Sticky Posts

                                                            • Kaizen #222 - Client Script Support for Notes Related List

                                                              Hello everyone! Welcome to another week of Kaizen. The final Kaizen post of the year 2025 is here! With the new Client Script support for the Notes Related List, you can validate, enrich, and manage notes across modules. In this post, we’ll explore how
                                                            • Kaizen #217 - Actions APIs : Tasks

                                                              Welcome to another week of Kaizen! In last week's post we discussed Email Notifications APIs which act as the link between your Workflow automations and you. We have discussed how Zylker Cloud Services uses Email Notifications API in their custom dashboard.
                                                            • Kaizen #216 - Actions APIs : Email Notifications

                                                              Welcome to another week of Kaizen! For the last three weeks, we have been discussing Zylker's workflows. We successfully updated a dormant workflow, built a new one from the ground up and more. But our work is not finished—these automated processes are
                                                            • Kaizen #152 - Client Script Support for the new Canvas Record Forms

                                                              Hello everyone! Have you ever wanted to trigger actions on click of a canvas button, icon, or text mandatory forms in Create/Edit and Clone Pages? Have you ever wanted to control how elements behave on the new Canvas Record Forms? This can be achieved
                                                            • Kaizen #142: How to Navigate to Another Page in Zoho CRM using Client Script

                                                              Hello everyone! Welcome back to another exciting Kaizen post. In this post, let us see how you can you navigate to different Pages using Client Script. In this Kaizen post, Need to Navigate to different Pages Client Script ZDKs related to navigation A.


                                                            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

                                                                                              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

                                                                                                              • Collaboration with customers made easy with Zoom Meeting and Zoho Desk integration

                                                                                                                Hello everyone! We are happy to announce that you can now integrate your Zoho Desk account with Zoom Meeting. The integration bridges the gap between digital communication and human connection, empowering teams to deliver timely support when it matters
                                                                                                              • CRM Canvas - Upload Attachments

                                                                                                                I am in the process of changing my screens to Canvas.  On one screen, I have tabs with related lists, one of which is attachments.  There doesn't appear to be a way to upload documents though.  Am I missing something really obvious?  Does anyone have
                                                                                                              • TrueSync regularly filling up my local disk

                                                                                                                Seems that WorkDrive's TrueSync randomly starts filling up my local hard drive space. None of the folders have been set as "Make Offline" but still it seems to randomly start making file offline. The settings of the app is so minimal and is of no real
                                                                                                              • Kaizen #194 : Trigger Client Script via Custom buttons

                                                                                                                Hello everyone! Welcome back to another interesting and useful Kaizen post. We know that Client Scripts can be triggered with Canvas buttons and we discussed this with a use case in Kaizen#180. Today, let us discuss how to trigger Client Script when a
                                                                                                              • [Webinar] A recap of Zoho Writer in 2025

                                                                                                                Hi Zoho Writer users, We're excited to announce Zoho Writer's webinar for January 2026: A recap of Zoho Writer in 2025. This webinar will provide a recap of the features and enhancements we added in 2025 to enhance your productivity. Choose your preferred
                                                                                                              • Picklist field shows "none" as default

                                                                                                                Hello, Is there an option to avoid showing "none" as the default value in a picklist field? I also don't want to see any option displayed. My expectation is to have a blank bar, and then when I display the drop-down list, I can choose whichever I wa
                                                                                                              • Stage-probability mapping feature in custom module

                                                                                                                Hi, I'm building a custom module for manage projects. I would like to implement the stage-probability feature that Potentials has. Is this possible?
                                                                                                              • Create static subforms in Zoho CRM: streamline data entry with pre-defined values

                                                                                                                Last modified on (9 July, 2025): This feature was available in early access and is currently being rolled out to customers in phases. Currently available for users in the the AU, CA, and SA DCs. It will be enabled for the remaining DCs in the next couple
                                                                                                              • Field Description is very small

                                                                                                                Hello, The field Description in the activity is very small. Why don't try open a new window, or a bigger popup, or increase the width of the "popup". Example:
                                                                                                              • StatusIQ

                                                                                                                Please add StatusIQ to data sources. We using site24x7 and StatusIQ together and site24x7 integration is already there. Thanks and regards, Torsten
                                                                                                              • In Zoho People, the Operations buttons are frequently not visible or do not appear consistently.

                                                                                                                In Zoho People, the Operations buttons are frequently not visible or do not appear consistently. We request you to please investigate and address this issue, as it is affecting daily HR operations and user access.
                                                                                                              • Marketing Tip #14: Increase cart value with product bundles

                                                                                                                Bundling products is a great way to increase average order value while giving customers more convenience. Think “camera + tripod + memory card” or “soap + lotion + bath salts.” Bundles make shopping easier and feel like a better deal. It’s a win-win for
                                                                                                              • Problem with Workdrive folders

                                                                                                                I'm having a problem a problem accessing files in a Zoho work drive folder when using the Zoho writer app. The problem folder appears grayed out in the Zoho work drive window in both the online and writer application. However I can open the folder in
                                                                                                              • Add RTL and Hebrew Support for Candidate Portal (and Other Zoho Recruit Portals)

                                                                                                                Dear Zoho Recruit Team, I hope you're doing well. We would like to request the ability to set the Candidate Portal to be Right-to-Left (RTL) and in Hebrew, similar to the existing functionality for the Career Site. Currently, when we set the Career Site
                                                                                                              • Auto tracking URL generation based on Carrier

                                                                                                                Hi, While creating a shipment order for a package in Zoho Books, I have a requirement that for example, if the carrier is Delhivery and tracking number is 1234, then can automatically the tracking link/URL be generated as www.delhivery.com/1234. Similary,
                                                                                                              • Zoho Bookings form pre-filled with Zoho Forms in

                                                                                                                Hi, I've got a contact page on my website and I'd like to have the option to book an appointment (redirected to zoho bookings page) after an option is submitted on the contact form. how would I go about doing this? thanks
                                                                                                              • Pre-orders at Zoho Commerce

                                                                                                                We plan to have regular producs that are avaliable for purchase now and we plan to have products that will be avaliable in 2-4 weeks. How we can take the pre-orders for these products? We need to take the money for the product now, but the delivery will
                                                                                                              • Customer ticket creation via Microsoft Teams

                                                                                                                Hi all, I'm looking to see if someone could point me in the right direction. I'd love to make it so my customers/ end users can make tickets, see responses and respond within microsoft teams. As Admin and an Agent i've installed the zoho assist app within
                                                                                                              • Zoho Books' 2025 Wrapped

                                                                                                                Before we turn the page to a new year, it’s time to revisit the updates that made financial management simpler and more intuitive. This annual roundup brings together the most impactful features and enhancements we delivered in 2025, offering a clear
                                                                                                              • Can multiple agents be assigned to one ticket on purpose?

                                                                                                                Is it possible to assign one ticket to two or more agents at a time? I would like the option to have multiple people working on one ticket so that the same ticket is viewable for those agents on their list of pending tickets. Is something like this currently
                                                                                                              • Edit default "We are here to help you" text in chat SalesIQ widget

                                                                                                                Does anyone know how this text can be edited? I can't find it anywhere in settings. Thanks!
                                                                                                              • Can't change form's original name in URL

                                                                                                                Hi all, I have been duplicating + editing forms for jobs regarding the same department to maintain formatting + styling. The issue I've not run into is because I've duplicated it from an existing form, the URL doesn't seem to want to update with the new
                                                                                                              • Feature Request: Sync Leave Tracker to Zoho Mail / Calendar or provide option to download information

                                                                                                                Zoho Leave Tracker offers the option to sync the leave Calendar to Microsoft 365 and Google Calendar. Adding an option to sync to Zoho-Mail Calendar would avoid duplication and add significant value for users. An alternative would be to allow users to
                                                                                                              • Compensation | Salary Packages - Hourly Wage Needed

                                                                                                                The US Bureau of Labor Statistics says 55.7% of all workers in the US are paid by the hour. I don't know how that compares to the rest of the world, but I would think that this alone would justify the need for having an hourly-based salary package option.
                                                                                                              • Multiple currencies - doesn’t seem to work for site visitors / customers

                                                                                                                I am trying to understand how the multiple currency feature works from the perspective of the website visitor who is shopping on my Zoho Commerce site. My site’s base currency is US Dollars (USD) but my store is for customers in Costa Rica and I would
                                                                                                              • Archiving Contacts

                                                                                                                How do I archive a list of contacts, or individual contacts?
                                                                                                              • How do people handle using Outlook and Zoho Project calendar at the same time?

                                                                                                                We have an ongoing problem in our organisation where we use Zoho Projects to plan all of our projects tasks and that also allows us to look forward using the workload report to see which of our consultants are overstretched etc and which are available.
                                                                                                              • 10GB Email Storage Limits in Zoho CRM

                                                                                                                We’ve had Zoho One for almost 5 years and have always synced our emails from Gmail via IMAP… As of late, we’ve run into issues with our emails not syncing, due to being over the 10GB storage cap… What’s very odd is that we haven’t changed a thing? I know
                                                                                                              • Performance is degrading

                                                                                                                We have used Mail and Cliq for about three years now. I used to use both on the browser. Both have, over the past 6 months, had a severe degradation in performance. I switched to desktop email, which appeared to improve things somewhat, although initial
                                                                                                              • How to set page defaults in zoho writer?

                                                                                                                hi, everytime i open the zoho writer i have to change the default page settings to - A4 from letter, margins to narrow and header and footer to 0. I cannot set this as default as that option is grayed out! so I am unable to click it. I saved the document
                                                                                                              • Add Israel & Jewish Holidays to Zoho People Holidays Gallery

                                                                                                                Greetings, We hope you are doing well. We are writing to request an enhancement to the Holidays Gallery in Zoho People. Currently, there are several holidays available, but none for Israel and none for Jewish holidays (which are not necessarily the same
                                                                                                              • Unable to Send Different Email Templates for Different Documents in Zoho Sign

                                                                                                                Hello Zoho Community, I am facing a limitation with Zoho Sign regarding email notifications sent to customers when a document is sent for signing. Currently, whenever I send any template/document for signing, the email notification that goes to the customer
                                                                                                              • Enable History Tracking for Picklist Values Not Available

                                                                                                                When I create a custom picklist field in Deals, the "Enable History Tracking for Picklist Values" option is not available in the Edit Properties area of the picklist. When I create a picklist in any other Module, that option is available. Is there a specific reason why this isn't available for fields in the Deals Module?
                                                                                                              • ZO25: The refreshed, more unified, and intelligent OS for business

                                                                                                                Hello all, Greetings from Zoho One! 2025 has been a remarkable year, packed with new features that will take your Zoho One experience to the next level! From sleek, customizable dashboards to an all-new action panel for instant task management, we’ve
                                                                                                              • Vault crashes on Android Devices

                                                                                                                Vault is continuously closing after entering the master password on my Android device. After several attempts I get a system message that says there is a bug in the app. I've uninstalled and reinstalled the app, and cleared the app cache, but nothing
                                                                                                              • ¿Cómo puedo configurar las contraseñas creadas bajo una directiva para que nunca caduquen y no aparezcan como caducadas en los informes?

                                                                                                                ¿Cómo puedo configurar las contraseñas creadas bajo una directiva para que nunca caduquen y no aparezcan como caducadas en los informes? La razón por la cual contraseña estas no deben caducar es porque su actualización depende de mi cliente y no de mí.
                                                                                                              • Camera access

                                                                                                                My picture doesn't appear in a group discussion. (The audio is fine.) The guide says "Click the lock icon on address bar," but I can't find it. Advise, please
                                                                                                              • Are static links available

                                                                                                                I'm still using Zoho Meeting in trial mode. My previous webinar software provided a static link, and I made the mistaken assumption that I could send out my link and start a meeting later. Mass confusion, but my fault. With a paid version do you get a
                                                                                                              • Why is Zoho Meeting quality so poor?

                                                                                                                I've just moved from Office 365 to Zoho Workplace and have been generally really positive about the new platform -- nicely integrated, nice GUI, good and easy-to-understand control and customisation, and at a reasonable price. However, what is going on
                                                                                                              • How to print a label from zoho creator app?

                                                                                                                Hello, I would like to print a label from zoho creator app record similar to attached one. Size 74mm x 102mm. I tried record template. It leaves plenty of space around the content and also I couldn't set the height of the page. So it is not printing properly. Could someone please direct me to right direction for this requirement?
                                                                                                              • Next Page