Here is a 16x20 inch photo hand signed by Muhammad Ali. The signature has been registered with Onlineauthentics.com

When Muhammad Ali floored Sonny Liston in their title-bout rematch in Lewiston, Maine, on May 25, 1965, a legend was born. Or, perhaps more accurately, a legendary boxing controversy was born. Ali knocked Liston out with a first-round right hand to the head that, all these years later, is still known as the “phantom punch.”

After all, an awful lot of people who were at the fight that night never saw, or later claimed that they never saw, the punch that floored Liston. Others were adamant that the punch was hardly a phantom, but instead was a perfectly timed blow that legitimately rocked the former champ.

Online authentics is a company which was set up by Muhammad Ali's agent to help combat the thousands of Ali fakes available on the market. Each item Ali signs is registered on their public database and guaranteed for life. It comes with a coded Online Authentics certificate of authenticity which has a matching code on the item. This code can then be typed into onlineauthentics.com at which point you will be told where, when and how the item was signed together with a photograph of your unique Ali autograph. This is the best way to guarantee an Authentic Ali autograph as it can be tracked right back to his agent. Without this certification, your Ali item will be grouped with thousands of others which may or may not be authentic but will be very difficult to track all the way back to Ali, and subsequently not worth as much. Online Authentics items are very limited and thus increasing the future value.