---
page_type: error
code: 50211
message: "50211: Identity parameter not acceptable for this Participant"
level: ERROR
product: Programmable Chat
---

## Error - 50211

### Conversations: Identity parameter not acceptable for this Participant

Participants on SMS, WhatsApp or other non-Chat channels cannot have Identities.

#### Possible Causes

This error is fired when the parameter _Identity_ is provided together with either:

- MessagingBinding.Address,
- MessagingBinding.ProxyAddress, or
- both of the above.

As the error indicates, such a combination is not allowed. You can provide either an address binding or an Identity, but not both.

#### Possible Solutions

- Avoid using both Identity and MessagingBinding.Address parameters when creating a Conversation participant. Instead, distinguish the use-case for your participants upfront and supply either the Identity for users of Programmable Chat Web/iOS/Android SDKs, or MessagingBinding.Address for non-Chat users such as SMS, MMS, WhatsApp, etc.