签名水太深，这里贴一下国外论坛总结的认证公司排名： am pretty active in autographs and have been for some time. I go to shows, buy online, and direct from companies. Included my thoughts below, with regard to the MAJOR companies, but one thing to note is there are several companies that have (or had) exclusives with select athletes which may not be well known, but are completely legit. I couldn't list them all out, but I just wanted to note that there are other completely legit companies, that are reputable, but not listed below, many of which I would put in Tier 1/2. You just have to do your research. In my opinion, this is how I look at the COAs:  Tier 1 - Ironclad: MLB authentication solo or combined with a company. Fanatics authentics, NEW Steiner, TriStar, Panini, Topps [Would include recent UDA, but they don't do baseball anymore] - These are the items that I buy with total faith. They have well documented exclusives and are the standard of the industry  Tier 2 - Trust, but verify: Older UDA items, Mounted Memories, Older Steiner, JSA Witness Protection, PSA In the Presence, Reggie Jackson - Like the above, these are all reputable companies that I trust, however they are prone to some forgers as there are examples of old holograms being moved to new items (UDA/Steiner) or abuse of "In person" 3rd party services (such as bringing fake items to the show). I always check to make sure they pass the eye test.  Tier 3 - A valuable Opinion: PSA/DNA, JSA, [Note: I own no SGC so I can't speak to them, and BAS is too new for me to have an opinion] - These are the only third parties I use. I ONLY use third party for vintage/deceased players (with the occasional exception of in person authentication listed in Tier 2), because there is no other option in most cases. These COAs can add value and confidence to a piece, but there are many well documented BAD autos that have gotten through. They are simply an opinion of a trained professional, but the quality of authentication can vary. For any of my BIG vintage pieces, I get BOTH. I also ALWAYS, do research online. PSA has a very good online library of exemplar signatures for most HOFers and stars. It's very helpful to weed out suspect items.  Tier 4 - Buyer Beware: These are the items/authentication that may have, at one point, been legit, maybe even reputable, but are very prone to fakes due to their methods of authentication OR the companies themselves went/were crooked. Generally, just stay away from these - There are too many to list but some include, Scoreboard, MVP, ASI, GAI, ACE, Say Hey/Mays (unless accompanied with MLB), Green Diamond (Williams)

蓝球来说，Fanatics相当于官方商城，放心买 Upper Deck，Panini，Steiner等大公司，基本把大宗球星都签的差不多了，放心买 PSA和JSA是第三方鉴定公司，绝大多数粉丝在球场和活动现场签到的面签，如果有COA都是这两家，有参考价值但是也要稍微小心 其他公司的证书基本上可以当成没有，另外一些公司的证书基本等于自动假证，看到了就可以直接当成假签名看，咸鱼还不少

PSA JSA Beckett虽然也是正经公司，但是我本人是完全不信任第三方鉴定的。。我比较了解国内珠宝行业的鉴定机构，他们的证书水不是一般深。。毕竟第三方的人并没有亲眼看见本人签，仅仅靠他们专家的主观判断评判真假。。而且他们只“鉴定”签名，并不管签字介质是不是莆田货，哪怕你在开腚纸上划拉两笔，只要你交钱，他们的专家说字迹真，就会给你证书。这直接决定经他们手的东西low到没下限 我认为买签名产品必须100%确定是真品，如果自己都不完全确定真假，哪怕只是一丁点怀疑那也毫无意义。所以nba周边我只买panini upperdeck steiner fanatics这四家

现在市面上还有一种“球星团队”认证的签名产品，我看那证书上面连个网址都没写，不知道这种是什么来历

你说的很对，我看到很多假球衣上有JSA签名认证，签名在数据库也能查到

只要是他们经手“鉴定”的东西，就能在他们自己的数据库查到 数据库能查到只能说明这东西经他们“鉴定”过，但我并不敢完全相信他们的“鉴定”

其他公司可以说说嘛？谢谢大佬😎

我买了件psa签名莺歌，觉得psa还是稳的，有一个专门可比较的签名图吧，相当于很多人签名可以对比的，上面也有序列号查查，不过还要小心点注意检查没问题就下手，小心使得万年船。

问题就在这，psa出证书的依据就是跟真签名比较，然后认为是真的。跟把球星专门请来看着他签，有本质的差别

所以说他认证别人送来的，有可能假也有可能真的。见仁见智。有可能是真的只是来源不太确定就是有怀疑也正常吖。

总之第三方证书就是一种给自己手里的非官方签名提升一点交易价值的手段，价格是很便宜，但是对买家来说信不信由你

有大佬普及下DCsports是什么鬼吗？

严格意义上DCsports甚至不是一家公司，只是个人。 DC就是这位湖人狂热粉丝Dan Ceniceros的缩写，他有很多湖人队的关系和年底久远的收藏（我跟他还见过一次，因为一件奥尼尔的GI球衣），也非常值得人尊敬，但是他的DCsports证书的鉴定方法基本上只是比尺码（比如他根据自己的知识，知道科比在什么什么时期真正穿什么尺码，由此推测这是不是真的GUGI）和跟他自己的收藏对比 所以，如果你和他见面，他给出的意见有参考价值，但是他的DCsports证书其实并没有太多意义，并且他不会给你hologram就是小粘贴，更没有网站帮你查号，坏人会很轻松的利用到他的那张证书（其实就一张纸）

你说的完全没有错，JSA和Beckett我没有去过，PSA我已经亲自去他们的活动现场认定自己的签名很多次。 这种第三方鉴定，从态度上来讲确实会全力帮你验证你的签名的真伪，但是他们的水平并没有想象中的那么无敌。会有很多出错的时候。 第二就是他们只看签名，不看商品本身，所以很多本身是假的球衣球鞋，上面有签名（还不一定是真的）会有PSA JSA的hologram。 说到底签名这东西就不是那种100%所有签名都可以鉴别出来的。 所以他们这些公司我认为会有一些参考价值（至少比没有强），但依然要小心

楼上都是大佬，我补充一点，Beckett 是鉴定科比签名比较权威的，以下来自autograph live网站 I consider Steve Grad, chief authenticator of Beckett Authentication Services, to be the number-one expert on Kobe Bryant autograph authentication in the world. And I'm not alone. Steve has professionally authenticated tens of thousands of Bryant autographs over the last 20 years—15,000 from one private signing in 2002 alone. No one has more experience.

总之我从不碰第三方，再便宜也不会碰 如果没有绝对的保证，即使是真签名我认为也没有交易价值，我不可能买个自己都不敢确定真假的东西回家供着

感谢大佬这么详细的解释，专业！还想请教下您看过这种dc证书吗？<img src="https://i11.hoopchina.com.cn/hupuapp/bbs/244933357486555/thread_244933357486555_20200319171453_s_358062_o_w_1125_h_1052_25584.jpg" data-w="1125" data-h="1052"/>

为什么我在fanatics买被砍单 是国内信用卡问题还是美国转运问题

<div>保罗的SW，<center class="hupu-img" data-h="1600"data-w="1200" data-origin="https://i5.hoopchina.com.cn/blogfile/20203/16/BbsImg_269991180151109_1584373718_s_200341_o_w_1200_h_1600_10047.jpg?x-oss-process=image/format,png" data_url="https://i5.hoopchina.com.cn/blogfile/20203/16/BbsImg_269991180151109_1584373718_s_200341_o_w_1200_h_1600_10047.jpg?x-oss-process=image/resize,w_1000/format,png" src="https://i5.hoopchina.com.cn/blogfile/20203/16/BbsImg_269991180151109_1584373718_s_200341_o_w_1200_h_1600_10047.jpg?x-oss-process=image/resize,w_600/format,jpg/quality,Q_60" data-imgid="7c8d7b7518a6d4e9b1917c90af7dfdde" ></center><center class="hupu-img" data-h="960"data-w="1600" data-origin="https://i5.hoopchina.com.cn/blogfile/20203/16/BbsImg_269991180151109_1584373729_s_287330_o_w_1600_h_960_89000.jpg?x-oss-process=image/format,png" data_url="https://i5.hoopchina.com.cn/blogfile/20203/16/BbsImg_269991180151109_1584373729_s_287330_o_w_1600_h_960_89000.jpg?x-oss-process=image/resize,w_1000/format,png" src="https://i5.hoopchina.com.cn/blogfile/20203/16/BbsImg_269991180151109_1584373729_s_287330_o_w_1600_h_960_89000.jpg?x-oss-process=image/resize,w_600/format,jpg/quality,Q_60" data-imgid="2ba8f8efca47bba21475ed1ef0762882" ></center><center class="hupu-img" data-h="1600"data-w="1562" data-origin="https://i3.hoopchina.com.cn/blogfile/20203/16/BbsImg_269991180151109_1584373735_s_329676_o_w_1562_h_1600_21666.jpg?x-oss-process=image/format,png" data_url="https://i3.hoopchina.com.cn/blogfile/20203/16/BbsImg_269991180151109_1584373735_s_329676_o_w_1562_h_1600_21666.jpg?x-oss-process=image/resize,w_1000/format,png" src="https://i3.hoopchina.com.cn/blogfile/20203/16/BbsImg_269991180151109_1584373735_s_329676_o_w_1562_h_1600_21666.jpg?x-oss-process=image/resize,w_600/format,jpg/quality,Q_60" data-imgid="835f0704d03953672ecf1f8b8f585a02" ></center></div>

人生第一件签名球衣，说说签名的鉴别

虎扑JR0069763482

<div data-type="normal">保罗的SW，<img src="https://i5.hoopchina.com.cn/blogfile/20203/16/BbsImg_269991180151109_1584373718_s_200341_o_w_1200_h_1600_10047.jpg" data-h="1600" data-w="1200" data-imgid="7c8d7b7518a6d4e9b1917c90af7dfdde"/><img src="https://i5.hoopchina.com.cn/blogfile/20203/16/BbsImg_269991180151109_1584373729_s_287330_o_w_1600_h_960_89000.jpg" data-h="960" data-w="1600" data-imgid="2ba8f8efca47bba21475ed1ef0762882"/><img src="https://i3.hoopchina.com.cn/blogfile/20203/16/BbsImg_269991180151109_1584373735_s_329676_o_w_1562_h_1600_21666.jpg" data-h="1600" data-w="1562" data-imgid="835f0704d03953672ecf1f8b8f585a02"/></div>

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