Here is your chance to get a really great and rare SIGNED FUNKO POP!! TOM WILSON SIGNED BACK TO THE FUTURE BIFF TANNEN FUNK POP FIGURE. This Funko has been authenticated by BECKETT One of The World’s Largest Authenticators! This item’s BECKETT CERTIFICATION NUMBER is. This Funko is awesome and extremely hard to find! It’s a must for any Back To The Future Fan!