[bilalnpe]

They could confirm the address you are requesting with the billing address on the card.

This is what the '$1 authorized charge' is for when you submit the address change/mail forwarding request.

[hamburglar]

I get shit loads of junk mail at my second address, which is not the billing address for my credit cards. They have to have a way to deal with that too.

[ceejayoz]

AVS chokes on apartment numbers pretty regularly.