My credit union allows me to deposit checks online via my scanner.
Scan in it, sign it, turn it over, scan that side in, boom! Instant funds deposited. Write "void" on the check and toss it. It's pretty easy and so convenient, although it always seems to take more than one try for some reason.
Today I am paying bills and had a couple of checks to deposit. One was in the scanner, already deposited. One was sitting in front of me waiting to go into the scanner next.
Guess which one I wrote "void mofo" on?