The newspaper said advisers had urged the heir apparent not to accept the donation.
Charles’ office in Clarence House disputed that, but confirmed the donation had been made. It said the decision to accept the money was made by the trustees of the charity, not the prince, and “thorough due diligence was taken in accepting this donation.”
The fund’s chairman, Ian Cheshire, also said the donation had been “fully approved” by the five trustees at the time, and that “any attempt to suggest otherwise is misleading and inaccurate.”
The Prince of Wales’ Charitable Fund was established in 1979 to “transform lives and build sustainable communities”, providing grants to a wide range of projects in Britain and around the world.
Charles, 73, has faced a series of allegations about the operation of his charities. Last month, the Sunday Times reported that he had taken $3 million bags of cash from Sheikh Hamad bin Jassim bin Jaber Al Thani, the former Prime Minister of Qatar.
London police are currently investigating a separate allegation that people with ties to another of the prince’s charity, the Prince’s Foundation, have offered to help a Saudi billionaire obtain honors and citizenship in exchange for donations. Clarence House has said that Charles was not aware of such an offer.