Hi @DTS Engineer I have a question that I would like to ask for help: According to the provided API (https://developer.apple.com/documentation/sign_in_with_apple/transferring_your_apps_and_users_to_another_team/), the transfer identifier of the old subject has been obtained. However, when obtaining the user identifier of the new subject, according to the API (https://developer.apple.com/documentation/sign_in_with_apple/bringing_new_apps_and_users_into_your_team), it is found that there are a large number of transfer identifiers that cannot obtain user identifiers. The error information returned by the interface is as follows: {"error":"invalid_request","error_description":"User not found."} and {"error":"invalid_request"} We have two apps under our account, Buyer and Seller. We have transferred the Seller app, the user sign in with Apple is the Buyer’s. The following is the relevant information used in the process of transferring APP The client_id for the transferring app is com.dhgate.DHgateBuyer, the teamId for the transferring team is 6PG7H3L6MA The client_id for the transferred app is com.dhgate.DHgateSeller, the teamId for the recipient team is Y2GSG84XX2