Many years ago, and after Buford passed, my FIL stopped in on Buford's mother's house and was invited inside for a visit. Before he left, she took him to a building in the backyard and dug around for a minute before giving my FIL a credit card slip, the old-fashioned one where the device swiped it side to side, for an oil change that had Buford's signature on it. He still has it.