The term "auto-graphing" refers to the act of signing one's own name, typically on an item or piece of memorabilia. Antonyms for this word would be any action that does not involve signing one's own name, such as refusing to sign, not signing, or opting to use a different name or signature. Some other possible antonyms could be using a stamp or digital signature instead of a handwritten one, or having someone else sign on one's behalf. Ultimately, the opposite of auto-graphing would be any activity that does not involve an individual physically signing a name, whether intentionally or not.