Digital Sports Photography Authenticate Signatures SUMMARY: Use your digital camera to authenticate professional athletes' signatures.   If you are lucky enough to get a professional athlete to sign a ball, program, hat, or whatever, have your digital camera ready. Ask if you can take a quick photo of you standing or sitting next to them. This photograph can help authenticate signatures for non-believing friends, or if you plan on selling an item later - perhaps at a sporting goods story or at an auction (such as eBay).   Add: Del.icio.us | Digg | Furl | My Yahoo!   Discuss This Tip Print This Tip Get E-Mail When New Tips are Online Return to the Digital Sports Photography page.