Former West Ham chief executive Paul Aldridge could take legal action following the club's £5.5m fine for breaching transfer regulations.
Aldridge says his reputation has been "besmirched" by the inquiry into the transfers of Argentine stars Carlos Tevez and Javier Mascherano.
Aldridge was chief executive when the pair were signed.
He says he was not called as a witness, invited to give a statement or notified in advance of allegations against him.
Aldridge said: "Naturally, my sympathies lie with the club I was chief executive of for 10 years in respect of what seems a very harsh sanction.
"However, my own personal and professional reputations have been besmirched. The findings accuse me of acting dishonestly and lying.
"This is hardly natural justice in my view. Until the publication of these findings, my integrity has never been questioned during my career.
"Accordingly, I have placed the matter in the hands of my lawyer who will be taking the matter further on my behalf."