This is incredible. In my 6+ years I have never seen nor heard of this type of mistake. I agree with all the posts here. If there is a corrected HUD you should compare the two and see what the difference is. Also this attorney should be telling you exactly what the difference is. A number that high would make me think it has to do with an inaccurate loan payoff or perhaps a HELOC that had a balance on it and wasnt properly recorded on the HUD.