John Lennon signed on day of his murder in 1980 is going on auction.The late Beatle‘s signature is displayed on a legal document that is up for auction through Gotta Have Rock and Roll tomorrow (October 4). You can view it here.The typed letter lists three people to whom Lennon gave his proxy to vote at an annual meeting for the Beatles corporations that was happening nine days later in London.It was signed by Lennon on December 8, 1980, hours before he was shot and killed by Mark Chapman outside his New York City apartment block.The document is expected to fetch between $30,000 (£26,366) and $50,000 (£43,943).Incidentally, Lennon also put his signature on another item that same day.