1. In the sample letter, fill in your personal information. Please be VERY CAREFUL what you write on the card, as we will follow the instructions we are given in registering you.My account number is ______________________. The following forms of payment will not be accepted. Personal Check; Debit Card; Credit Card. Square offers two free generic credit card authorization forms for download. You do not have to process payments with Square to use these templates. Dear Parent or Guardian of <> <>,. Complaint Information. Please explain your complaint: Try to be brief, but be sure to tell WHAT happened, WHEN it happened and WHERE it happened.