A cashiers check does not have to be signed by the person sending money. The person who cashes the check must sign it at the time she cashes or deposits it. The bank fills out any documents needed to pay money through a cashiers check and reviews the account.
A cashier's check is one of the most guaranteed and secure ways to send and receive money. The money is drawn from the bank's funds instead of from a personal account. The bank removes the amount of money from the persons' account once the recipient signs and cashes out or deposits the check.