as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
physical checks - mailing
user
you can try writing on the back of the check, in the signature area, "for deposit only to account xxxxxxxxx", leaving room for the signature. this may or may not be legally binding, but it states your intnt and is in a form the bank will recognize.
assistant