# Meeting registrant unique identifier data type

**URL:** <https://devforum.zoom.us/t/meeting-registrant-unique-identifier-data-type/140156>\
**Category:** API and Webhooks\
**Created:** [December 22, 2025, 8:36pm UTC](https://devforum.zoom.us/t/meeting-registrant-unique-identifier-data-type/140156 "2025-12-22T20:36:07Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![desautelsj](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/desautelsj/32/23584_2.png) [@desautelsj](https://devforum.zoom.us/u/desautelsj)\
**Post date:** [December 22, 2025, 8:36pm UTC](https://devforum.zoom.us/t/meeting-registrant-unique-identifier-data-type/140156/1 "2025-12-22T20:36:07Z")

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When adding a registrant to a meeting, [documentation](https://developers.zoom.us/docs/api/meetings/#tag/invitation--registration/post/meetings/%7BmeetingId%7D/registrants) says that we should expect a response that looks like this (notice the “id” node contains a numerical value):

 ![image](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/8/2/8283e5f93bd33554a0c751401a81e5098f0d6bc1.png)

When retrieving the list of registrants for a given meeting, [documentation says](https://developers.zoom.us/docs/api/meetings/#tag/invitation--registration/get/meetings/%7BmeetingId%7D/registrants) we should expect a response like this (notice the “id” node contains a string value):

 ![image](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/1/7/1791937e06923214ea3a1019e37717627bd8709b.png)

I find it weird that the data type of this unique identifier is not consistent.

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**Author:** ![gianni.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/gianni.zoom/32/32523_2.png) [@gianni.zoom](https://devforum.zoom.us/u/gianni.zoom)\
**Post date:** [December 23, 2025, 2:43pm UTC](https://devforum.zoom.us/t/meeting-registrant-unique-identifier-data-type/140156/2 "2025-12-23T14:43:11Z")

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Hi @desautelsj ,

In the first example, the `id`is the meeting id. In the 2nd example, `id` is the registrant id, however I see in the documentation example that the string length differs from the `registrant_id` in the first example. It may be a length range that is acceptable for registrant id, but need to confirm that with the webinar team.

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**Author:** ![desautelsj](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/desautelsj/32/23584_2.png) [@desautelsj](https://devforum.zoom.us/u/desautelsj)\
**Post date:** [December 23, 2025, 2:59pm UTC](https://devforum.zoom.us/t/meeting-registrant-unique-identifier-data-type/140156/4 "2025-12-23T14:59:53Z")

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> [@gianni.zoom](#):
>
> In the first example, the `id`is the meeting id. In the 2nd example, `id` is the registrant id

oh I see. So despite the fact they share the same name, they are in fact not the same. Somehow I missed this distinction. Thanks for pointing it out.

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**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\
**Post date:** [December 24, 2025, 2:59pm UTC](https://devforum.zoom.us/t/meeting-registrant-unique-identifier-data-type/140156/5 "2025-12-24T14:59:59Z")

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Closed on December 24, 2025, 2:59pm UTC

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