Funny thing about US checks, too: as long as you put the bank's routing number and your account number on there, along with a few other key bits of information,

Funny thing about US checks, too: as long as you put the bank's routing number and your account number on there, along with a few other key bits of information, any old piece of paper can be a valid check. You could carry a blank pad around and use it for the same purpose, though convincing the teller to accept it is a bit more difficult.