I'd like to put together a one page reference guide/directory that lists telephone numbers and websites that can be used by our tellers to verify authenticity of common checks, money orders, and travelers checks. So far I have a website for US Treasury checks, and phone numbers for USPS M.O.s, WalMart M.O.s, and American Express Traveler's checks. If anyone has others that I could add to my list I'd much appreciate the help. Thank you!