# Webhook missing authorization header

**URL:** <https://devforum.zoom.us/t/webhook-missing-authorization-header/11999>\
**Category:** API and Webhooks\
**Created:** [April 7, 2020, 9:04pm UTC](https://devforum.zoom.us/t/webhook-missing-authorization-header/11999 "2020-04-07T21:04:49Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![tommy](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/tommy/32/72769_2.png) [@tommy](https://devforum.zoom.us/u/tommy)\
**Post date:** [April 8, 2020, 7:42am UTC](https://devforum.zoom.us/t/webhook-missing-authorization-header/11999/3 "2020-04-08T07:42:49Z")

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Hey @dojohnso,

Please see this post about PHP Webhook Authorization header:

> [@Data Compliance API - Deauthorization Endpoint URL](https://devforum.zoom.us/t/data-compliance-api-deauthorization-endpoint-url/3870/15):
>
> Hey @john! You are correct, you will only receive the Deauthorization Event Notification Webhook with the Production version of your app. You can test this by installing the production version of your app via your apps publishable URL, [54%20PM] And then [uninstalling your app on your “Installed Apps” page.](https://marketplace.zoom.us/user/installed) I made a simple PHP web server and was able to see the Verification Token in the request headers (when testing a Zoom event/webhook sent to my server). Here is my code: Examp…

Thanks,  
Tommy

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