---
title: 1038: Part not sendable. | API Docs
description: This part type is inbound-only.
---

**HTTP status:** `422`. May also be reported as a field-level finding in `error.details[]`.

The part at param is a real type (for example interactive\_reply, order, referral, system, unsupported) that only arrives from customers and cannot be sent.

## Troubleshooting

- Use a sendable part type; GET /v1/openapi.yaml marks which are outbound.

## Related

- [Part schemas](/channel/whatsapp/api/resources/contract/methods/part_schema/index.md)
- [Sending messages guide](/channel/whatsapp/guides/messaging/sending-messages/index.md)