SPTO (United States Patent and Trademark Office) published a patent application filed by the USPS. The patent claims that a combination of the security of the blockchain and the mail service provides a reliable voting system. A registered voter receives a QR code by mail. A separation of voter identification and votes to ensure voter anonymity is the principal feature of the solution. The votes are stored on a blockchain attested by election officials. Obviously, this patent is too late to be developed and deployed for this election.