---
title: "Lists Contact Identity Conflicts"
method: GET
path: "/v1/projects/{project_id}/contacts:identityConflicts"
tags: ["Contact"]
---

# Lists Contact Identity Conflicts

`GET /v1/projects/{project_id}/contacts:identityConflicts`

Lists contact identity conflicts across supported SIM-based channels (SMS, MMS, RCS).
Use this to identify contact records sharing the same identity (e.g., phone number), which must be resolved before enabling the Unified Contact ID feature.

## Query parameters

- `page_size` integer
- `page_token` string

## Response `200`

A successful response.

- object
  - `conflicts` object[]
    - `identity` string — The identity value (e.g., phone number) that is duplicated across contacts.
    - `channels` string[] — List of channels where this identity is present.
    - `contact_ids` string[] — List of contact IDs that share this identity.
  - `next_page_token` string — Token for retrieving the next page of results.

## Other responses

- `400` — Malformed request. See [common error responses](https://developers.sinch.com/docs/conversation/api-reference/#common-error-responses) for more information.
- `401` — Incorrect credentials. See [common error responses](https://developers.sinch.com/docs/conversation/api-reference/#common-error-responses) for more information.
- `403` — Correct credentials but you don't have access to the requested resource. See [common error responses](https://developers.sinch.com/docs/conversation/api-reference/#common-error-responses) for more information.
- `500` — Correct credentials but you don't have access to the requested resource. See [common error responses](https://developers.sinch.com/docs/conversation/api-reference/#common-error-responses) for more information.
- `501` — Something went wrong on our end, try again with exponential back-off. See [common error responses](https://developers.sinch.com/docs/conversation/api-reference/#common-error-responses) for more information.

---

[API](https://skmtc.net/sinch/apis/conversation-api-sinch.md) · [All operations](https://skmtc.net/sinch/apis/conversation-api-sinch/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/sinch/conversation-api-sinch/revisions/bdb3e0c48bf7/schema)