The act of digitally transmitting what resembles a paper-based payment instrument through electronic mail is the central point. This method involves creating an electronic image of a physical check, typically in formats like PDF or JPEG, and sending it as an attachment. As an example, a person owing money to another might create a digital image of a filled-out check and send that image as an email attachment rather than mailing the physical paper check.
This method, though seemingly convenient, presents potential security risks and is not a universally accepted practice. While it offers the advantage of speed and reduced mailing costs in certain situations, the lack of standardized security protocols can expose sensitive banking information to unauthorized access. Historically, the sending of sensitive documents via email has been discouraged due to the inherent vulnerabilities of email communication.