I was trying to register my son's UCI. I choose Principal account or sponsor, then I enter my son's UCI and Application number and get an error: "Incorrect or invalid information. Review and make sure it matches the information submitted on the Use of a Representative [IMM 5476] form or the Authority to Release Personal Information to a Designated Individual [IMM 5475] form. If you can’t create an account, it may be because your client’s application is not in our system yet."
Since he is a minor, I am thinking maybe choose the Representative or Designated Individual. But then it asks for a Party ID which I do not have.
Can you tell me how you registered your minor family members?
Thanks.