Democratic Sen. John Kerry said Friday he has personally accepted Texas oilman T. Boone Pickens’ offer of $1 million to anyone who can disprove even a single charge of the Swift Boat Veterans for Truth. And Kerry vows he will be the one who will collect the loot, and will donate any proceeds to the Paralyzed Veterans of America.

“While I am prepared to show they lied on allegation after allegation, you have generously offered to pay one million dollars for just one thing that can be proven false,” Kerry wrote to Pickens in a letter obtained by the AP. “I am prepared to prove the lie beyond any reasonable doubt.”

But Pickens, who provided $3 million to bankroll the Swift Boat group during Kerry’s 2004 race against President George W. Bush, has now reneged on his deal. He responded to Kerry’s letter by saying he won’t consider giving Kerry the reward unless he provides his combat films, additional military records and wartime journal.

Pickens had issued the challenge on Nov. 6 in Washington, while serving as chairman of a 40th anniversary gala for American Spectator magazine.