The concept itself is not new, with common law jurisdictions having recognized telegraph signatures as far back as the mid-19th century and faxed signatures since the 1980s. From Wikipedia
Crane Federal Credit Union Routing Number. 283977688 routing number is a 9-digit number designed and assigned to Crane Federal Credit Union by The American Bankers Association (ABA) to identify the financial institution upon which a payment was drawn.
Routing Number. DCU's Routing Number: 211391825. An ABA number sometimes known as a check routing number or routing transit number (RTN), is a sequence of nine numeric characters used by financial institutions, including credit unions and banks to identify specific financial institutions within the United States.