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
do i need to write the date on the back of a received check when depositing it?
user
you do not need to write anything on the second line.  there are a variety of helpful things that you can add, e.g.: for deposit only.  this tells the bank to deposit the check into your account and ignore other signatures.   your account number.  especially useful when added to "for deposit only".   a countersignature.  this tells the bank to pay the check to someone other than you.   countersigned checks used to be much more common than they are now.  someone who didn't have a bank account might ask someone who did to cash a check for them.   see also:  four ways to endorse a check which gives the correct format for endorsing a check in these ways.
assistant