Presidential candidate Donald Trump may have used charity funds to win an item at another charity’s auction, according to the Washington Post.

The item? A signed Tim Tebow Denver Broncos helmet and a Tebow Broncos jersey.

Per the Washington Post, Trump won the items with a bid of $12,000 four years ago at a charity auction.

“But Trump didn’t actually pay with his own money.

Instead, the Susan G. Komen organization — the breast-cancer nonprofit that hosted the party — got a $12,000 payment from another nonprofit, the Donald J. Trump Foundation.

Trump himself sent no money (In fact, a Komen spokesperson said, Trum has never given a personal gift of cash to the Komen Organization). He paid the bill with money from a charity he founded in 1987, but which is largely stocked with other people’s money. Trump is the foundation’s president. But, at the time of the auction, Trump had given none of his own money to the foundation for three years running.”

The Washington Post questioned whether Trump violated IRS rules against “self-dealing,” pointing out that “the answer may depend on what became of the helmet and jersey.” If Trump gave the helmet and jersey to another charity or “to someone as a charitable activity,” then those rules might not have been broken.