This specifically requires buy-in from whatever venue you're trying to gain access to with the ticket, which remains an authority. As long as they have some oth

This specifically requires buy-in from whatever venue you're trying to gain access to with the ticket, which remains an authority. As long as they have some other means of associating an identity with the original purchase, they can deny entrance to anyone else possessing the ticket. In other words, you absolutely need permission from the original ticketing authority. In practice, this would work for any venue that sells tickets to anonymous buyers, but most sufficiently in-demand events at least pay some lip service to trying not to do that to avoid getting all of their tickets purchased by professional scalping operations using bots.