# E15051 — WhatsAppGroupJoinRequestNotFound

One of the named join requests is not waiting for a decision on this group.

- **HTTP status**: `422`
- **Type**: `validation_error`
- **Name**: `WhatsAppGroupJoinRequestNotFound`

## What to do

List the group's join requests and use the ids it returns. A request leaves the list once it is decided, and also when the person cancels it, so an id that was valid earlier can be gone by the time you use it. Only a group created with join_approval_mode approval_required collects join requests at all.

## Related

- [E15xxx — WhatsApp sending & delivery](/docs/api/errors/E15xxx): every code in this range
- [Errors](/docs/api/errors): the full wire contract, status mapping, and error catalog
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`

## Related resources

- [Should I use a Bird SDK or call the API directly?](/explained/platform/should-i-use-an-sdk-or-call-the-api-directly) (answer)
- [Build your first integration](/learn/paths/integration) (course)
- [Send your first email](/docs/get-started/send-your-first-email) (docs)

[Get an implementation brief](/learn/workspace?topic=api-basics)