They will only reduce a VARR rating if the previous rating assigned represents a clear and unmistakable error ("CUE") or was procured by fraud. Since VA C&P exams in the IDES process are performed by VA-approved contractors such as QTC, VES, or LHI/OptumServe, fraud is not really an issue. CUE errors rarely occur, as this type of CUE would be on the D-RAS Rating Activity level, where the rating formulas are applied straightforwardly. So there is no real risk, as the worst-case scenario in 99% of VARR responses is a finding of "no change."