What is the purpose of a deposit slip?

A deposit slip is a printed form which accompanies bank deposits. The depositor fills out the deposit slip to indicate what types of funds are being deposited and which accounts they should be deposited into. In some cases, a bank will pre-print deposit slips with account information and include them in a checkbook. Deposit slips are used by a bank to keep track of the money deposited over the course of a business day, and to ensure that no funds slip through the cracks. For bank clients, a deposit slip offers a form of protection, indicating that funds were counted and accepted by the bank. If the deposit is processed improperly, the deposit slip will provide a paper trail.