This product is an original, signed tour poster from the Band of Horses concert at the Mission Ballroom on November 4, 2021. Measuring 18"x24", this music memorabilia item is a unique collectible piece from the show in Denver Colorado in 2021 just after the industry really got moving again that fall after Stupid covid. The autograph authentication is not specified, All I can say is I know the manager onsite who organized the signing and gave the poster to my Son. If theres anything else you need for clearer authentication you can get in touch in messages.