This is a Framed 11x17 Movie Poster, approximately 19x26, that has been hand signed by Michael J. Fox & Christopher Lloyd This item has been witnessed and certified authentic by Beckett Authentication (BAS) and comes with their tamper-proof witness sticker. Beckett Authentication has recently changed their physical certificate card policy where they no longer match their tamper-proof sticker with a physical certificate. A certificate can be printed on Beckett's website for the matching authentication number.