100% authentic in person. SIGNED BY : Guy Pierce. You can consult the AUTOGRAPHACOA website for verification of authentication. I have included a screenshot from the website. Where was this item signed? Guy signed this item during an Q and A for the Brutalist. This item is authenticated by ACOA (Autograph COA) Cert # SD59163. They are intended to help verify authenticity. If not in the listing, then unfortunately, no proof photos were obtained. Sells were obtained first hand. Inked Autographs 100% guarantees the authenticity of all autographs for sale. International Buyers – Please Note.