# The parameter is required: last\_name

**URL:** <https://devforum.zoom.us/t/the-parameter-is-required-last-name/69611>\
**Category:** API and Webhooks\
**Created:** [May 26, 2022, 4:16pm UTC](https://devforum.zoom.us/t/the-parameter-is-required-last-name/69611 "2022-05-26T16:16:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![pshchur](https://avatars.discourse-cdn.com/v4/letter/p/bcef8e/32.png) [@pshchur](https://devforum.zoom.us/u/pshchur)\
**Post date:** [May 26, 2022, 4:16pm UTC](https://devforum.zoom.us/t/the-parameter-is-required-last-name/69611/1 "2022-05-26T16:16:01Z")

</div>

Is `last_name` a required attribute while adding a registrant to a meeting?

In the [documentation](https://marketplace.zoom.us/docs/api-reference/zoom-api/methods/#operation/meetingRegistrantCreate) it is stated that `first_name` and `email` are the only required parameters while adding a registrant to a meeting. But when I use the following request body:

```auto
{
    "email": "test@gmail.com",
    "first_name": "Pavlo"
}

```

I receive the error:

```auto
{
    "code": 300,
    "message": "The parameter is required: last_name."
}

```

---

<div class="post-metadata">

**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\
**Post date:** [May 26, 2022, 5:52pm UTC](https://devforum.zoom.us/t/the-parameter-is-required-last-name/69611/2 "2022-05-26T17:52:30Z")

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Hi @pshchur  
Thanks for bringing this up to our attention.  
The last\_name is indeed required.  
I will reach out to our Documentation team to fix this issue.  
Thanks,  
Elisa 🙂

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<div class="post-metadata">

**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:** [June 26, 2022, 3:52am UTC](https://devforum.zoom.us/t/the-parameter-is-required-last-name/69611/3 "2022-06-26T03:52:40Z")

</div>

Closed on June 26, 2022, 3:52am UTC

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