At Authentic United we have over 15 years experience in passionately collecting genuine autographed football memorabilia. The majority of our collection includes an official Certificate of Authenticity from the football club; usually with unique, matching holograms on the certificate and shirt. When collecting signed memorabilia we try to obtain as much information as possible about the origin and include proof of authenticity where possible; including letters from the club or certificates from the company who original obtained the autograph. As fellow collectors will know, over time you become accustomed to the autographs and can identify genuine autographs, however we appreciate that some people like the reassurance of having a COA. With this in mind, if any of our items don’t include an official club certificate or documentation, we issue an’Authentic United’ Certificate of Authenticity. An’Authentic United’ certificate includes a photo and description of the autographed item, along with a unique number. The unique number will exactly match the tamper proof hologram sticker on the item. Details of the item are below. Sheffield United 2024/2025 Squad Signed Shirt. An Authentic United Certificate of Authenticity. These are genuine autographs obtained from the players themselves. I have packed this item with the upmost care to ensure it reaches you in perfect condition.