From what I know as a teller at BofA: You take the zincs to the bank. They get deposited to your account as cash, we take the bag and put it in our vault. Twice a week, the armored truck guy comes with cash, usually we need to order more large bills and boxes of coin for merchants. He takes our bags and puts them in the truck. After they go back with him, they get dumped into a coin counter to verify the amount. They are sorted by denomination and then rerolled. Then, they sit as inventory in the warehouse until a new order is placed for boxes, which is when they go back on the truck and back to the bank again. Now the question is, how many warehouses are there in your area and what are the chances you get back your old zincs. I live the in the Portland, OR area and I know Brinks has at least 3 warehouses, and they service Wells Fargo and Chase in our area as well. I have been sorting and dumping for over 6 months and needless to say, my copper % hasn't gone down a bit. If I were you, I would ask what day/time the armored guy comes to your bank (if they use armored services) and then you can ask him/her. From my experience they are usually pretty cool about telling you how it works. The first couple of times I ordered $500 worth of boxed pennies my guy was a little upset, but now I buy him coffee every few weeks and he's cool