"began to sign"... what an odd way to phrase it.
The thing about that form 180 Kerry filled out (which you can see
here) is that it only releases the documents to the reporters specified. I could be wrong, but I don't think the documents themselves have been made public in full by those reporters or by Kerry.
He doesn't
have to do anything. But people don't have to believe him either.
It may not be, sure. Of course, how satisfying a victory is it really to be able to say that only one charge was wrong? Kerry hardly needs the money, Pickens can stand to lose it, and if Kerry wins after a long fight on only one claim, Pickens will probably just say that's the only one Kerry can disprove. Perhaps not fair, but nobody said politics was.