Documents purportedly relating to the midfielder's move showed that his agent Mino Raiola stood to benefit to the tune of £41m off the deal and FIFA subsequently opened an investigation into the transfer.
World football's governing body has now made it clear United will not face potential punishment, but the agreement between Juventus and Raiola might be in breach of third-party ownership regulations.
"We can confirm that disciplinary proceedings have been opened against Juventus," a FIFA spokesperson told ESPN.
"We cannot comment further as proceedings are ongoing.
"We can confirm that no disciplinary proceedings have been opened against Manchester United."