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<p>[QUOTE=&quot;BaseballGames, post: 588020, member: 7826&quot;]It probably depends somewhat on whose signature you&#039;re looking to authenticate.&nbsp; We assume there are authentication services that tend to specialize in specific groups of signatories -- literary, artistic, political, historical, show biz, &amp;c&#039;.&nbsp; JSA (James Spence Authentication) began certifying autographs of sports figures, but has expanded into authenticating signatures by (or purported to be by) almost anyone in any sphere of activity.&nbsp; From what we&#039;ve read over the years, they&#039;re the most prominent autograph authentication service in the States.&nbsp; </p><p><a href="https://www.spenceloa.com/aboutjsa" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.spenceloa.com/aboutjsa" rel="nofollow">https://www.spenceloa.com/aboutjsa</a>&nbsp; </p><p>Note that this not an endorsement -- we&#039;ve also heard many stories about JSA certifying forgeries as authentic, and rejecting authentic signatures as not convincing.[/QUOTE]</p><p><br /></p>

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