You go to their website, and say how much you want to deposit (lets say $100). They will give you a final deposit amount that is pretty similar, but different (

You go to their website, and say how much you want to deposit (lets say $100). They will give you a final deposit amount that is pretty similar, but different (e.g. $99.86), which allows them to identify your deposit. Once the deposit is made, they verify it, and if there are any problems, they will request your receipt.