Ah, OK -- that is quite different. Upon further thought, signature verification is probably part of why they check ID here (and it does seem clear that they prefer a picture ID, though they will accept other things). That is, they compare your signature on the form you sign when you walk in to the one on your ID. Bank statements and utility bills don't usually have signatures, but I guess that's part of why they're towards the bottom of the list of acceptable proof of identification. Also, if you can't produce any of the 17 types of acceptable ID in Georgia, they have you sign a sworn oath and then let you vote.