FIFA's ethics committee have opened investigation proceedings against Mohamed bin Hammam.
The Qatari was banned from all football activity for life last year after being found guilty of bribery by a FIFA ethics committee panel during his campaign for the presidency of the sport's world governing body.
However, the 63-year-old's ban was annulled by the Court of Arbitration for Sport on July 19 this year after his appeal was upheld on grounds of insufficient evidence.
He was provisionally suspended by FIFA's ethics committee following the CAS ruling and a statement from FIFA today read: "The chairman of the investigatory chamber of the FIFA ethics committee, Michael J Garcia, today formally opened investigation proceedings against Mohamed bin Hammam.
"These proceedings follow the provisional banning of Bin Hammam for 90 days as established by the Ethics Committee on 26 July 2012 after a preliminary investigation of the case."