# Merging signed documents as STAMP bug

**URL:** <https://pdfjs.community/t/merging-signed-documents-as-stamp-bug/1786>\
**Category:** Technical Support\
**Created:** [June 20, 2022, 12:32pm UTC](https://pdfjs.community/t/merging-signed-documents-as-stamp-bug/1786 "2022-06-20T12:32:11Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![system](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/ffbcd25c7d423db8d5acd5db201c272f4db306dd.png) [@system](https://pdfjs.community/u/system)\
**Post date:** [June 20, 2022, 12:32pm UTC](https://pdfjs.community/t/merging-signed-documents-as-stamp-bug/1786/3 "2022-06-20T12:32:16Z")

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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 Custom PDF Stamps using JavaScript | PDF.js Express SDK - Standard stamps](https://pdfjs.express/documentation/annotation/stamps#standard-stamps)
- [Creating custom annotations for your viewer - Saving custom XFDF (optional)](https://pdfjs.express/documentation/annotation/custom-annotations.8#saving-custom-xfdf-(optional))
- [Create image stamp annotations in PDF.js Express](https://pdfjs.express/documentation/annotation/create-annotation-stamp)

APIs:
- [Core.Tools.SignatureCreateTool - addSignature()](https://pdfjs.express/api/Core.Tools.SignatureCreateTool.html#addSignature__anchor)
- [Core.Tools.CropCreateTool - cropApplied](https://pdfjs.express/api/Core.Tools.CropCreateTool.html#event:cropApplied__anchor)
- [Core.Document - mergeDocument(source [, position])](https://pdfjs.express/api/Core.Document.html#mergeDocument__anchor)

Forums:
- [Merging annotations through the PDF.JS Express API not work anymore](https://pdfjs.community/t/merging-annotations-through-the-pdf-js-express-api-not-work-anymore/1785/4)
- [Disable annotation grouping, rotating and resizing / feature disabling issues](https://pdfjs.community/t/disable-annotation-grouping-rotating-and-resizing-feature-disabling-issues/1550/1)
- [Merge API doesn’t save PDF checkboxes](https://pdfjs.community/t/merge-api-doesnt-save-pdf-checkboxes/843/1)

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_[View the full topic](https://pdfjs.community/t/merging-signed-documents-as-stamp-bug/1786)._