WHAT IS THE AUTHORIZATION LETTER?
The authorization letter is a document written by a football federation to allow one of their teams to participate to a foreign tournament. You must contact your football federation asking their authorization letter as soon as possible; we suggest to attach our invitation letter and our confirm of participation. We must receive the authorization letter directly from your team manager by the 31st of January, or the participation will be denied and the team substituted with a local team.
What follows is an example of an authorization letter.