Fax transmissions

Facsimile machines are commonly used tools of business, whenever a client requires a hard copy of a document. They can also be simulated using web services, and made untraceable by the use of prepaid phones connected to mobile fax machines or by use of a public fax machine such as one owned by a document processing business like FedEx Office/Kinko's. Thus, scammers posing as business entities often use fax transmissions as an anonymous form of communication. This is more expensive, as the prepaid phone and fax equipment cost more than e-mail, but to a skeptical victim it can be more believable.