Preauthorized Checks (PACs) Daniel Guidotti 11 years ago Preauthorized Checks (PACs)Payer checks authorized in advance and used to make safe payments. Written by payee or his bank and deposited in the account of the payee for settlement.Recommended for you:Preauthorized Electronic Debits (PADs) Checks and Balances 1.05% APY on Savings Account at CIT Bank Online Banking