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## Resource: Conversation ID

## Article: Conversation ID

## Article Link: https://dev.wix.com/docs/api-reference/crm/communication/inbox/conversations/conversation-id.md

## Article Content:

# About the Conversation ID

Each conversation starts with a unique ID, but this ID may change throughout the conversation's lifecycle. 
When a participant's type changes, a new conversation (with a new, unique ID) is created and the previous conversation is merged into the new one.

Before sending a message, ensure you are using the most current conversation ID by calling the 
[Get or Create Conversation](https://dev.wix.com/docs/rest/crm/communication/inbox/conversations/get-or-create-conversation.md) method
with the participant's visitor, contact, or member ID. You can retrieve the participant's ID when the 
[Message Sent To Business](https://dev.wix.com/docs/rest/crm/communication/inbox/messages/message-sent-to-business.md) event is triggered.

## Participant types and IDs

Participants are assigned IDs based on whether they've provided contact information or registered as a site member.
Typically, a participant flow is **anonymous visitor** > **contact** > **member**,
although it's possible to skip a step or to become a contact and site member at the same time.

### Anonymous visitor (`anonymousVisitorId`)
When the participant first interacts with a site, they are an anonymous visitor.

When the visitor sends a message to the business, the 
[Message Sent To Business](https://dev.wix.com/docs/rest/crm/communication/inbox/messages/message-sent-to-business.md) event 
is triggered and the ID is available at `actionEvent.body.message.sender.anonymousVisitorId`.

### Contact (`contactId`)
An anonymous visitor converts to a contact when they provide some contact information, such as a name, phone number, or email address. 
This most often happens when they submit a contact form, purchase something, or become a site member. 
When a visitor converts to a contact, they’re added to a site’s [contact list](https://support.wix.com/en/article/about-your-contact-list).

When the contact sends a message to the business, the 
[Message Sent To Business](https://dev.wix.com/docs/rest/crm/communication/inbox/messages/message-sent-to-business.md) event 
is triggered and the ID is available at `actionEvent.body.message.sender.contactId`. 
You can also use [Query Contacts](https://dev.wix.com/docs/rest/crm/members-contacts/contacts/contacts/contact-v4/query-contacts.md) 
or [List Contacts](https://dev.wix.com/docs/rest/crm/members-contacts/contacts/contacts/contact-v4/list-contacts.md) in the Contacts API to retrieve the contact.

### Member (`memberId`)
An anonymous visitor or contact becomes a member when they are registered as a [site member](https://support.wix.com/en/article/site-members-about-the-members-area). 
Members are always linked to a contact, so they have both a member ID and a contact ID.

When the member sends a message to the business, the 
[Message Sent To Business](https://dev.wix.com/docs/rest/crm/communication/inbox/messages/message-sent-to-business.md) event 
is triggered and the ID is available at `actionEvent.body.message.sender.memberId`. You can also use 
[Query Members](https://dev.wix.com/docs/rest/crm/members-contacts/members/members/query-members.md) or 
[List Members](https://dev.wix.com/docs/rest/crm/members-contacts/members/members/list-members.md) in the Members API to retrieve the member.