In attempting to verify these documents -- from FIFA, the various federations and clubs involved -- only the world governing body and the Belgian FA responded directly to CNN's request to confirm their authenticity, while a professional Belgian referee confirmed that the Anderlecht team sheet was the type of paperwork used in Belgian football.

CNN: SHARE THIS

Reporters scoured press reports, interview transcripts and, whenever possible, court documents to verify settlements.

FORBES: The 10 Most Expensive Celebrity Divorces

Players are required to produce documents to verify their identity, address, and source of funds where relevant, before they are able to withdraw any funds.

FORBES: WinPoker Becomes First Major Gambling Operator To Adopt Bitcoin

They would also have to verify they are Connecticut residents with documents such as lease agreements or utility bills.

WSJ: Connecticut Weighing Driver's Licenses for Illegal Immigrants

Company officials created false documents, such as invoices, customer checks and account statements to verify business activity that never occurred or existed.

FORBES: Le-Nature's Final Prison Tally