How do you call a small paper form that a bank customer includes with a bank deposit to show how much money he or she is putting in a bank account

It is a small paper form that has to be filled out before making a withdrawal of money from a bank.

It is a school document that shows information about a learner or student who enrolls in a specific school.

What do you need to remember in filling out forms?

How do you call an employee of the bank whose job is to help bank customers with their banking needs, such as depositing checks or cash or making a withdrawal