This is right off their website LOL.
WOW! To be so bold as to actually post that on your site.. Just goes to show you how terrible FP really is... Granted, they aren't in any way required to accept GW letters or to honor them.. but you would think that they wouldn't come out on their site basically saying.. dont even try it.. we dont care.. what a crock they are
Why did you dispute?
But disputing and sending a GW letter are totally different things.
I disputed becuase I was never late. I understand that a dispute is not the same as a GW letter. If FP isn't accepting GW letters, the dispute process may work for the OP.