[rockrr]

Do not return it to the passer.

I wonder if that means to complete the transaction because you'll be in a heap~o~trouble if you confiscate the customer's property and aren't an officer.

[PJBankard]

I would believe not, as you can’t give them the merchandise without receiving a proper legal payment.

[Focault's Pendulum]

I wonder if that means to complete the transaction because you'll be in a heap~o~trouble if you confiscate the customer's property and aren't an officer.

Under these circumstances it not illegal to confiscate retain the merchandise. They don't own it until it is legally paid for.