However, the world's football governing body has confirmed that proceedings have begun for the Serie A giants.
Both clubs were notified last month to provide extra information of the world-record transfer.
Extracts from a book, Football Leaks: The Dirty Business of Football, claimed that Pogba's agent, Mino Raiola, was mooted to make £41m from the transfer.
A FIFA released by read: "We can confirm that disciplinary proceedings have been opened against Juventus FC.
"We cannot confirm further as proceedings are ongoing.
"We can confirm that no disciplinary proceedings have been opened against Manchester United."