; or (ii) upon discovery of the name and address of a claimant not appearing on the issuer’s books within 30 days after the discovery of such name and address. (4) Rulemaking authority relating to determination of claims (A) In general The Corporation may prescribe regulations regarding the allowance or disallowance of claims by the Corporation, as receiver, and providing for administrative determination of claims and review of such determination. (B) Final settlement payment procedure In the handling of receiverships of payment stablecoin issuers, to maintain essential liquidity and to prevent financial disruption, the Corporation may, after the declaration of an issuer’s insolvency, settle all unsecured claims on the receivership with a final settlement payment which shall constitute full payment and disposition of the Corporation’s obligations to such claimants. (5) Procedures for determination of claims (A) Determination period (i) In general Before the end of the 180-day period beginning on the date any claim against a payment stablecoin issuer is filed with the Corporation as receiver, the Corporation shall determine whether to allow or disallow the claim and shall notify the claimant of any determination with respect to such claim. (ii) Extension of time The period described in clause (i) may be extended by a written agreement between the claimant and the Corporation. (iii) Mailing of notice sufficient The requirements of clause (i) shall be deemed to be satisfied if the notice of any determination with respect to any claim is mailed to the last address of the claimant which appears— (I) on the payment stablecoin issuer’s books; (II) in the claim filed by the claimant; or (III) in documents submitted in proof of the claim. (iv) Contents of notice of disallowance If any claim filed under clause (i) is disallowed, the notice to the claimant shall contain— (I) a statement of each reason for the disallowance