足球认证有哪些？
目前，国际足联FIFA、欧洲足联UEFA和亚洲足联AFC三大权威机构都对球员的注册有明确的要求—— 首先必须是成年男子组的成员（18-21岁为成年U21组），其次必须是由官方注册的球员并且必须拥有自己的球员号码； 而对于“官方注册”球员资格界定，这三个组织的标准又略有不同…… 先说国际足联的判定方式：
2005年9月6日FIFA正式发布的第3号修改公告（FIFA RULES OF FOOTBALL 2006/2007 EDITION）中关于球员注册与转让（Article4，Transfer of Players）的第4条明确规定了“Official Registration and Player's Eligibility”（官方注册及球员的资格），即球员资格分为两个部分：
一、Player’s eligibility (球员资格)
二、The player is registered with the club he intends to join.(球员已经注册在要加盟的俱乐部下)， 也就是说符合以下条件的人才算是一个真正的注册球员：
a. He must be under a binding contract in accordance with Art. 18， Rule A; b. His registration has been entered into FIFA’s International Transfer Match List by either his current or future professional club at least seven days before any transfer operation concerning him takes place， unless otherwise provided for herein. 如果一名球员只签署了职业合同而没有完成在国际转会登记系统中的注册，他将不能算是正式的注册球员也不能代表新东家在比赛中出场。而像小法那样的情况就属于未在国际转会登记系统中进行注册的情况，所以还不能算一名合法的注册球员。因此他们只能在冬歇期等时间窗口才能自由转会。
下面说欧洲足联的判定方式： 根据欧洲足联《UEFA Club Licensing & Finance Rules》第四章球员注册（Players Registrations Regulation）之Article 3规定可知：
* Article 3： Player registrations – General principles
b. The club shall be bound， during each season within which it maintains an official squad list， towards all those players included on that list whose names appear therein according to Articles 1 through 4 above， except as set out below：
c. In addition， in order for a player to be counted among the authorised squads under this article， he must have met one of the following conditions：(i) the player was previously registered with another UEFA member federation；或(ii) the player was last registered by a non-European team between January 1st， 2002 and June 30th， 2006. d. Notwithstanding sub-paragraph c above， a player who transfers once every three consecutive seasons from July 1st until June 30th may not be accepted if there are other eligible players available without delaying the start of the season by more than two weeks. 对于一个球员资格的评估周期是以三年为一个连续赛季来计算的，比如某球员A于2013年1月至7月期间曾效力过X队，那么他就满足上述条例c条款第(ii)项的规定而被列为非