Charlesâ Clarence House Office said it would no longer use the services of Fawcett or his party planning company, Premier Mode.
Fawcett, Charlesâ former valet, stepped down from the charity role temporarily in September and an independent investigation was launched after the Sunday Times newspaper reported the allegations.
His resignation comes after the Mail on Sunday published a letter from 2017 in which Fawcett reportedly wrote that he was willing to make an application to get businessman Mahfouz Marei Mubarak bin Mahfouz an honorary knighthood and support his application for citizenship in response to âthe most recent and anticipated supportâ for the charity.
Mahfouz has denied any wrongdoing.
The Princeâs Foundation said when the allegations emerged that it took them seriously and âis committed to the highest ethical standards.â
Charles is president of the foundation, but he is not involved with its governance or day-to-day activities.