# Not received my license key

**URL:** <https://pdfjs.community/t/not-received-my-license-key/982>\
**Category:** Technical Support\
**Created:** [September 9, 2021, 6:10am UTC](https://pdfjs.community/t/not-received-my-license-key/982 "2021-09-09T06:10:24Z")\
**Posts on this page:** 1\
**Showing post:** 2

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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:** [September 9, 2021, 6:10am UTC](https://pdfjs.community/t/not-received-my-license-key/982/2 "2021-09-09T06:10:27Z")

</div>

**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:
- [Adding your license key - Development](https://pdfjs.express/documentation/get-started/add-license-key#development)
- [Integrating existing Angular project with PDF.js Express - Prerequisites](https://pdfjs.express/documentation/get-started/angular/exist-project#prerequisites)
- [Development - Without a license key](https://pdfjs.express/documentation/utils/development#without-a-license-key)

APIs:
- [Core - preloadPDFWorker(pdfBackendType, workerHandlers)](https://pdfjs.express/api/Core.html#.preloadPDFWorker__anchor)
- [Development](https://pdfjs.express/api/utils/index.html#__anchor)
- [Core.Annotations.WidgetAnnotation - new WidgetAnnotation()](https://pdfjs.express/api/Core.Annotations.WidgetAnnotation.html#WidgetAnnotation__anchor)

Forums:
- [How to protect my license key](https://pdfjs.community/t/how-to-protect-my-license-key/560/2)
- [Watermark doesn’t get removed after putting license key](https://pdfjs.community/t/watermark-doesnt-get-removed-after-putting-license-key/193/1)
- [Watermark shows for some users](https://pdfjs.community/t/watermark-shows-for-some-users/263/1)

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_[View the full topic](https://pdfjs.community/t/not-received-my-license-key/982)._