The Washington Commanders sent a 22-page letter to the Federal Trade Commission on Monday denying claims of financial impropriety, according to ESPN's John Keim.
The team also attached 83 pages' worth of signed affidavits, emails and texts.
"I can state unequivocally that I never helped maintain, or saw anyone else maintain, a 'second set' of books,'" Paul Szczenski, the team's former director of finance, wrote in an affidavit.
The House Committee on Oversight and Reform accused the Commanders of "potentially unlawful" financial conduct based on allegations from former employee Jason Friedman, per Mark Maske and Nicki Jhabvala of the Washington Post.