My management is curious as to what others are doing regarding documentation (e.g., ((un)signed receipt, withdrawal slip, check) in the drive thru lanes for customer cash withdrawals?

Are you------
having everyone sign every receipt/withdrawal slip for a cash withdrawal and then imaging it?
- not requiring a signature under $XX?
utilizing remote signature pads in your drive through?
requiring checks as "the receipt" for withdrawals?
other?

We spend a lot of time imaging signed receipts, which has become an even bigger time "suck" as more transactions have moved to the drive through lane as a result of the pandemic. If it matters, we are an approximately 500 million dollar credit union.

Thank you.

How does the bank document an in-person teller line request for withdrawal?

I worked a drive-up window at a couple of banks once in a while. If a customer wanted to withdraw from their savings account and didn't have a signed withdrawal order completed when they arrived at the drive-up, we gave them a blank withdrawal form to complete. No signature, no money.

Our procedures are the same for in lobby or at drive thru. Savings withdrawal slip signed by customer - also there is a box on the withdrawal slip to x when cash is taken out. Cash out of checking account, customer writes a check and endorses the back of the check. These procedures leave a clear paper trail if questions arise. We image/capture all of the transactions everyday, for every department.

I freely admit that it's been ages since I worked a teller position -- in a lobby or a drive up. But I don't understand how a customer would obtain cash from their account at a drive-up without completing and signing a withdrawal request or check. Perhaps the OP's bank has technology deployed at the drive up that changes all that old-school thinking.