# Webinar Registrant - Name retrieval

**URL:** <https://devforum.zoom.us/t/webinar-registrant-name-retrieval/6746>\
**Category:** API and Webhooks\
**Created:** [November 20, 2019, 11:10am UTC](https://devforum.zoom.us/t/webinar-registrant-name-retrieval/6746 "2019-11-20T11:10:04Z")\
**Posts on this page:** 1\
**Showing post:** 4

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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:** [December 11, 2019, 6:03pm UTC](https://devforum.zoom.us/t/webinar-registrant-name-retrieval/6746/4 "2019-12-11T18:03:50Z")

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Hey @priya.jetley,

What is the webinarUUID you passed in when you got the “Meeting ID is invalid or not end.” error?

Did you try [double url encoding](https://www.urlencoder.org/) it?

> [@Dashoboard API - get Participants list | Working partially](https://devforum.zoom.us/t/dashoboard-api-get-participants-list-working-partially/6172/2):
>
> Hey @joseph.pradeep, thanks for posting and using Zoom! The issue is some of the uuids have / in them which messes up the path in the request. Can you try [double url encoding](https://www.urlencoder.org/) the uuids when calling: [https://api.zoom.us/v2/metrics/webinars/{doubleUrlEncodedUUID}/participants?type=past](https://api.zoom.us/v2/metrics/webinars/%7BdoubleUrlEncodedUUID%7D/participants?type=past)[https://marketplace.zoom.us/docs/api-reference/zoom-api/dashboards/dashboardwebinarparticipants](https://marketplace.zoom.us/docs/api-reference/zoom-api/dashboards/dashboardwebinarparticipants) More details here: Let me know if this helps! slight_smile Thanks, Tommy

Thanks,  
Tommy

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