if you have an EX CR it should tell you when it will fall off, but generally I always figure it to fall off the month following DOFD, for example, i had something DOFD was 3/2001, well my CR says date for removal,4/2008, of course it is still on my CR but EX is lagging on removing it, i plan to pull EX on may 1st and it should be gone. hope this helps