Letter of Instruction. Used only if there is a beneficiary named on the account.You can write a letter, sign it and hand it to a bank professional. They will accept the letter but, may still have you sign their form. Find and fill out the forms you need. Today we are talking about how to fill out a withdrawal slip. The Credit Human Member Service Center is available to help you Monday-Friday 7 am to 7 pm and Saturday 9 am to 12 pm CT. Just call toll free at 800-688-7228. San Antonio, TX 782659109. Find the closest MoneyPass ATM near you! With 37,000 surcharge-free MoneyPass ATMs across the US, we made it easier for you to withdraw cash from an ATM!