Check Duplicate
### Check for duplicate customer applications.
**Available to:** Organization administrators
**Environments:** Live
**[Rate Limit](/overview/core-concepts/rate-limits):** No endpoint-specific limit
Check whether similar customer applications already exist before submitting a full subaccount request with [`createPartnerSubAccountRequest`](/api/rest-api-endpoints/users/create-partner-subaccount-request). This can help you avoid duplicate application rejections by catching conflicts early.
All fields are optional. Provide any combination of `userId`, `taxIdentifier`, `nationalId`, `countryCode`, and `organizationId` to narrow the search. The response returns `ok: true` if no duplicate concern was found, or `ok: false` if potential duplicates exist.
**Related Endpoints**
- Use [`createPartnerSubAccountRequest`](/api/rest-api-endpoints/users/create-partner-subaccount-request) to submit a subaccount request after confirming no duplicate exists.
Authentication
AuthorizationBearer
Bearer authentication of the form Bearer <token>, where token is your auth token.
Request
This endpoint expects an object.
userId
taxIdentifier
nationalId
countryCode
organizationId
Response
SimpleResponse
ok
errorText
Non-empty if the request failed

