Its a private API which is given behind an entitlement, we dont have a lot of documentation or discussion about this API in the public forums, nor does the documentation state in which case it may or may not fail, the only thing we have are back end logs where we see the API being triggered on success of this setUPIVerificationCodeSendCompletion function, which was not supposed to be triggered for that person. We dont know how to simulate it. Which is why i am asking here. Do you want me to raise a bug report? I cant simulate it, but the logs say otherwise. And answering if in the chain has raised it with apple, its above my pay grade, i am not aware of this, i assuming it has been. If you're not in a position to answer this, i understand.