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

                                                                                                            • Self Client Authorization Code Flow for Mail returns 404

                                                                                                              Hello, I'm having trouble getting the Zoho mail api setup and want a sanity check. I am trying to follow this guide to get an access token for the mail api: https://www.zoho.com/accounts/protocol/oauth/self-client/authorization-code-flow.html Unfortunately
                                                                                                            • Zoho Knowledgebase Help Center Categories linkages are wrong

                                                                                                              Greetings, I am build a help center in zoho desk, based on the additional custom brand I have paid for. My knowledge base has 4 main categories. I have this setup this way in my knowledgebase customization theme area. The page layout is like this: Here
                                                                                                            • Resizing a Record Template Background Inage

                                                                                                              Hi everyone, I have an issue which I can't seem to resolve: Basically, I'm designing a record template in certificate form. I've specified A5 landscape. I've set my background image the same dimensions with total pixels at 443,520. Whatever I try, when
                                                                                                            • Connecting Learn to a Custom GPT

                                                                                                              Hi all! I am attempting to connect a Learn Space and all it's articles into a custom GPT. Has anyone successfully done this? I have worked on it with no success so far.
                                                                                                            • Tip 12: How can you customize the display name while sending emails from Zoho Creator.

                                                                                                              Hi folks, Usually when you send emails to your users, the display name defaults as your From email address. Most often, you would like to set a custom display name to represent your organization or the context of the email. You can mask or customize the display name (From Address) using Deluge script as long as the From email address has been verified. This would be very useful to you if you want to send bulk emails to a large audience.    Let's say you have a Student Registration form for your dance
                                                                                                            • Importing Data to update and not add

                                                                                                              I'm very new to Zoho created and tried searching the forums for the answer. Nothing I found has helped me make sense of how to do this. I created a app based on an excel spreadsheet but no matter what I do, whenever I import data it duplicates the record. I have a field I would like to use as a unique identifier, but I'm not sure how to tell my app that.  Any assistance, even a link to a tutorial on creating functions in the workflow of the app, would be very helpful. Unfortunately I can't share
                                                                                                            • Allow me to duplicate a field

                                                                                                              Hi, Many times I need to create new field with slightly change compare to an existing one. So when I click an existing field, can you add one more option "duplicate"? That'd be very helpful. You mayc heck wufoo.com to see this feature. Thanks, Li lhong1
                                                                                                            • Community Digest Noviembre 2024 - Todas las novedades en Español Zoho Community

                                                                                                              ¡Hola, Español Zoho Community! Wow, ya termina el año, ¡gracias a vuestra participación se nos ha pasado volando! Por eso mismo estamos preparando sorpresas para todos los que participáis en la Español Zoho Community para el próximo año, ¡estad atentos
                                                                                                            • Zoho Mail iOS app - Complete revamp of the UI including insert image option, toolbar customization, calendar widgets and more!

                                                                                                              Hello everyone! The new Zoho Mail iOS app introduces a fresh look, blending native iOS features with a refined UI and UX to make email management more intuitive. The updated design focuses on simplicity, ensuring smoother navigation throughout the app.
                                                                                                            • Download API file contents from browser

                                                                                                              Hi Team - is there something being planned to be able to trigger file downloads from the browser via a deluge script? i.e. retrieve a file via API, trigger the file download directly from the browser. Or... using the convertToPdf function (https://www.zoho.com/deluge/help/functions/file/convert-to-pdf.html)
                                                                                                            • Adding a work order for Assets vs. changing the contact person

                                                                                                              When adding a work order for an existing Assets (e.g. service), the assigned contact cannot be changed (deleting the contact deletes the selected Assets). This results in such an illogical operation that if you want to change the person to be contacted,
                                                                                                            • DOMIN NME

                                                                                                              How many email account do zoho supports
                                                                                                            • Assign admins to the application

                                                                                                              I want to know who to assign admins to UAE Payroll application. I tried from inside the application, and from one.zoho.com >> directory and nothing is happening, knowing that I have enabled zoho people integration with payroll. Can someone help me?
                                                                                                            • Zoho Marketing Campaign

                                                                                                              I want a details report of marketing API . which API i can use to get a full flexed detail of email campaign , sms , social media ,and all other campaigns ?
                                                                                                            • ¿Puedo migrar mi sitio desde WordPress a Zoho? ¿Zoho admite herramientas con código personalizado?

                                                                                                              ¡Hola comunidad! Estoy evaluando la posibilidad de migrar mi sitio web https://calculadoradenotas.cl/ desde WordPress a una solución Zoho, y tengo algunas dudas técnicas que espero puedan aclararme. Mi sitio no es solo informativo: es una herramienta
                                                                                                            • Automating SharePoint Folder Creation based on Equipment Module

                                                                                                              Dear Team, I would like to seek your valuable advice on one of my requirements. My objective is to automatically create a SharePoint folder whenever a record is created in the Equipment module. The folder should be named based on the equipment name. Once
                                                                                                            • Can I view a gallery of attachments related to an Account, Contact, or Subscription

                                                                                                              It is often useful to review photos related to an account or contact by service type. It would be nice to be able to see the photos collected through workorders or appointments all associated.
                                                                                                            • Language Field on Contact Person-level

                                                                                                              Dear at Zoho Books, would it be possible for you to have a Field for 'Language' for the Contact Persons under a Company. In CRM and Bigin we could create a Custom Field (Dropdown) for this effect but without any present in Zoho Books we could never sync
                                                                                                            • Customise Zoho FSM Work Order Name

                                                                                                              Hi there, is there a way for us to customise the work order number? For example - I want to add auto look up for company name or dates at the end of the work order number. WO4 - Company ABC
                                                                                                            • Introducing Dynamic Display in Zoho CRM mobile apps

                                                                                                              Hello everyone, We're happy to announce that Dynamic Display is now available in the Zoho CRM mobile app for both iOS and Android devices. Mobile apps have become synonymous with convenience and flexibility. As more and more businesses rely on mobile
                                                                                                            • How we can integrate pdf attachments in zoho crm with xero

                                                                                                              when i tried to integrate the data and attchment from zoho crm to to xero only the data get integrated with xero how we can integrate the pdf attachment as well nb zoho apis are not working via functions
                                                                                                            • Delete user profile

                                                                                                              Hello, How can I delete a User Profile?
                                                                                                            • Send emails directly via Cases module

                                                                                                              Greetings all, The ability to send emails from the Cases module, which users have been eagerly anticipating, is now available, just like in the other modules. In Zoho CRM, Cases is a module specifically designed for managing support tickets. If your organization
                                                                                                            • Introducing delegate signing in Zoho Sign

                                                                                                              Hi everyone! We are happy to announce a new feature in Zoho Sign — Delegate Signing! Whether you're tied up in meetings, away on vacation, or managing multiple responsibilities, you can now assign a delegate to sign documents on your behalf. This ensures
                                                                                                            • Deleting Salutation Field

                                                                                                              We have updated our lead input screen and 'Salutation' has appeared. This is not visible in the 'Edit Pgae Layout' screen so cannot be moved to 'List of Removed Fields'  Salutation is visible in the list in 'Customization - Fields' however I can only 'Edit' or 'Replace' I cannot delete and I do not need this field on my lead input screen.  Please can you advise how to get rid of this.  Screen shots can be provided if needed.  Thank you Tasha
                                                                                                            • Zoho Voice VS in Zoho CRM for logging calls

                                                                                                              I don't understand the differences between logging calls in Zoho Voice VS in Zoho CRM. Why the 2 separate platforms? Seems confusing
                                                                                                            • Updates to Auto-Upgrade in Zoho Campaigns

                                                                                                              Hello everyone, We've rolled out a new update that slightly modifies how the auto-upgrade option in Zoho Campaigns works. Even if you hit the contact limit, this update ensures that your account is upgraded and that contacts are imported smoothly—without
                                                                                                            • Adding Sub-Forms to Merge Documents

                                                                                                              I am setting up a Mail Merge, which includes sub-form table data. I've done it before but now I am having issues: 1. The headings don't show. I had to enter these manually 2. The table lines are separated. I want them together. Anyone know how to fix
                                                                                                            • Zoho Bookings Online Training | July 31, 2025

                                                                                                              Hi everyone! We’re back with the second session of our Zoho Bookings training series! This time, we’ll show you how to automate your scheduling, manage appointments more efficiently, and explore advanced features for your industry. Join our free, two-hour
                                                                                                            • Translation of Tooltip Messages

                                                                                                              The descriptive help messages should be available to provide translations for.
                                                                                                            • Delete Inactive Zoho Accounts - Access Cleanup_User Id: 60001640923

                                                                                                              As part of our Zoho access hygiene, we’ve reviewed and deactivated several inactive user accounts. These accounts have not been used in the past year and are no longer tied to active operations. All access rights have been revoked, and records retained
                                                                                                            • CREATE button is grayed

                                                                                                              On Android adding new notes to notebooks with collections is impossible because the CREATE button is grayed. What can be done?
                                                                                                            • Can Zoho Creator Apps have multiple actors and steps? Example

                                                                                                              Mortgage Application App- Outside party fills out form via published website form, Inside party approves for additional documentation, outside party recieved requests for x, y, and z documents.  Outside party submits x, y and z but z is wrong.  Inside
                                                                                                            • How to download all attachments from inbox, send, other folders in one go

                                                                                                              Hi All, Appreciate if anyone could help me with steps for below requirement. How to download all attachments from inbox, send, other folders in one go. Even mapping to new folder will help me.  Thanks in advance. 
                                                                                                            • Re-Apply SLA When Ticket Reopened from Closed Status?

                                                                                                              If you have an SLA applied, timers are deactivated when going to "On Hold" status type and reactivated when going back to an Open status type. What we discovered is when a customer replies to a closed case and it reopens, the SLA is not applied and timers
                                                                                                            • Zoho Expense Reimbursement

                                                                                                              I am using Zoho Expense for employee expenses.  At year end I accounted for reimbursement for the founders' expenses by doing a manual entry between employee reimbursements and shareholder loan.  All is correct in the balance sheet, but in Zoho expense the expense report totals are showing as owing still.  It doesn't impact the books, but I don't want to see amounts owing.  How can I zero these out?  The only way I can see it is by creating a transaction in Books that pays the employee via a bank
                                                                                                            • Request to Delete Mistakenly Created Zoho Desk Account – Access Blocked to Company Directory

                                                                                                              Dear Zoho Support Team, I hope this message finds you well. I am writing to request assistance regarding a Zoho Desk account I mistakenly created using my company email address. I created the account before being officially onboarded by my company, and
                                                                                                            • Introducing an AI-driven CAPTCHA for Help Center that offers improved accessibility and enhanced security | Zoho Desk | Product Update

                                                                                                              Captcha protects your help center from fraud and abuse without creating friction. What is a CAPTCHA? CAPTCHA is a test used in computing to verify that a user is human by requiring them to complete a challenge. It helps prevent bot attacks and reduce
                                                                                                            • Announcing new features in Trident for Windows (v.1.29.4.0)

                                                                                                              Hello Community! Trident for Windows just got better! It’s packed with new features designed to enhance communication, manage important information securely, and give you a smoother, more productive experience. Let’s dive into what’s new! Access Zoho
                                                                                                            • Exporting Ticket Threads/Comments and Attachments in Reports

                                                                                                              Hi, I would like to know is it possible for Ticket Comments and/or Attachments to be displayed in Reports?
                                                                                                            • Next Page