(a) Payment of any approved claim shall not be made unless the claimant executes (1) a Standard Form 1145, (2) a claims settlement agreement, or (3) a Standard Form 95, as appropriate consistent with applicable rules of the Department of Justice, Department of the Treasury, and the General Accounting Office. When a claimant is represented by an attorney, the voucher for payment shall designate both the claimant and the attorney as payees, and the check shall be delivered to the attorney, whose address shall appear on the voucher.

(b) If the claimant or the claimant's agent or legal representative accepts any award, compromise, or settlement made pursuant to the provisions of section 2672 or 2677 of title 28, United States Code, that acceptance shall be final and conclusive on the claimant, the claimant's agent or legal representative, and any other person on whose behalf or for whose benefit the claim has been presented. The acceptance shall constitute a complete release of any claim against the United States and against any employee of the Government whose act or omission gave rise to the claim, by reason of the same subject matter.