Joseph Blatter and Michel Platini have been sent the full reasons for their eight-year bans from football, the ethics committee of the ruling body FIFA said on Saturday.
The FIFA president Blatter and the UEFA boss Platini can study the documents with their legal teams and have three days to decide whether to appeal the bans before the FIFA appeal committee.
Platini attempted to go straight to the Court of Arbitration for Sport (CAS) but was told by FIFA that he must first appeal at FIFA.
Platini's lawyer Thibaud d'Ales confirmed to French news agency AFP that the reasons have arrived, and said they would "appeal to the appeal committee on Monday."
Blatter is also expected to appeal.
"The adjudicatory chamber of the independent Ethics Committee has fulfilled its commitment to provide the grounds for the respective decisions to Mr Blatter and Mr Platini within the first half of January 2016," FIFA said in a statement.
Blatter and Platini were banned in connection with a "disloyal" payment of 2 million dollars Platini received in 2011 for FIFA work done between 1998 and 2002.
Both men protested their innocence and said they had a verbal agreement but the ethics committee said they were guilty of conflict of interest and breach of loyalty.
Blatter wants to be cleared because he aims to chair an extraordinary FIFA congress on February 26 where his successor will be elected.
Platini had intended to run for the top job but withdrew this week. However, he needs to be cleared to remain UEFA president.
The ethics committee also said Saturday that it has extended the suspension of former FIFA executive Worawi Makudi of Thailand by 45 days as it continues an investigation on undisclosed charges.