according to the SS, only accept United States Postal Money Orders. If they somehow spoof them, then they have the postmaster and additional government on their tail. Plus they are REALLY hard to dupe. You could also REQUIRE that they send the reciept from the post office trasaction of buying the MO's...
good to know...but i'm not sure i would send the original receipt because i would want to keep it as proof to collect my money in the event that the MOs got lost in the mail and were never presented for payment. maybe a photocopy but not the original.