20 C.F.R. § 10.17

When a beneficiary either pleads guilty to or is found guilty on either Federal or State criminal charges of defrauding the Federal Government in connection with a claim for benefits, the beneficiary's entitlement to any further compensation benefits will terminate effective the date of conviction, which is the date of the verdict or, in the case of a plea bargain, the date the claimant made the plea in open court (not the date of sentencing or the date court papers were signed). The employing agency may, upon request, be required to provide the documentation needed for termination under this section. Termination of entitlement under this section is not affected by any subsequent change in or recurrence of the beneficiary's medical condition.