# Merge API doesn't save PDF checkboxes

**URL:** <https://pdfjs.community/t/merge-api-doesnt-save-pdf-checkboxes/843>\
**Category:** Technical Support\
**Created:** [June 23, 2021, 5:37pm UTC](https://pdfjs.community/t/merge-api-doesnt-save-pdf-checkboxes/843 "2021-06-23T17:37:52Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![stefans](https://avatars.discourse-cdn.com/v4/letter/s/9d8465/32.png) [@stefans](https://pdfjs.community/u/stefans)\
**Post date:** [June 23, 2021, 5:37pm UTC](https://pdfjs.community/t/merge-api-doesnt-save-pdf-checkboxes/843/1 "2021-06-23T17:37:52Z")

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HI,

I have a PDF form, which has fields and checkboxes. When I filled form I’m sending document to the merge API. The pdf that I get from your server does have the fields filled out, but the checkboxes are not checked.  
Can you please tell me what is the issue and how I can resolve this problem?

Thank you,  
Stefan

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<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/ffbcd25c7d423db8d5acd5db201c272f4db306dd.png) [@system](https://pdfjs.community/u/system)\
**Post date:** [June 23, 2021, 5:37pm UTC](https://pdfjs.community/t/merge-api-doesnt-save-pdf-checkboxes/843/2 "2021-06-23T17:37:57Z")

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**Hello, I’m Ron, an automated tech support bot 🤖**

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

Guides:
- [Create fillable forms - Modify fields to readonly](https://pdfjs.express/documentation/forms/fill-form-fields#modify-fields-to-readonly)
- [Support forms with PDF.js Express](https://pdfjs.express/documentation/forms/overview)
- [Signatures with PDF.js Express - Get started](https://pdfjs.express/documentation/signature/overview#get-started)

APIs:
- [PartRetrievers.LocalPdfPartRetriever](https://pdfjs.express/api/PartRetrievers.LocalPdfPartRetriever.html#__anchor)
- [PartRetrievers.ExternalPdfPartRetriever](https://pdfjs.express/api/PartRetrievers.ExternalPdfPartRetriever.html#__anchor)
- [Annotations.WidgetFlags - new WidgetFlags(options)](https://pdfjs.express/api/Annotations.WidgetFlags.html#WidgetFlags__anchor)

Forums:
- [Save annotation, checkbox in a form](https://pdfjs.community/t/save-annotation-checkbox-in-a-form/685/1)
- [Confirm output of trial form field merger](https://pdfjs.community/t/confirm-output-of-trial-form-field-merger/744/1)
- [Merge Rest API - how to flatten PDF?](https://pdfjs.community/t/merge-rest-api-how-to-flatten-pdf/328/1)

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<div class="post-metadata">

**Author:** ![Logan](https://yyz1.discourse-cdn.com/flex031/user_avatar/pdfjs.community/logan/32/13_2.png) [@Logan](https://pdfjs.community/u/Logan)\
**Post date:** [June 25, 2021, 2:25pm UTC](https://pdfjs.community/t/merge-api-doesnt-save-pdf-checkboxes/843/4 "2021-06-25T14:25:09Z")

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Hi there - in the future please fill out the issue template correctly.

Which version of express are you using? Does this only happen with a specific document? If so, please share the document with me if possible. Can you send a code snippet showing how you are using the rest api?

Thanks!