7 U.S.C. § 938 : US Code - Section 938: Full faith and credit of the United States

Search 7 U.S.C. § 938 : US Code - Section 938: Full faith and credit of the United States

Any contract of insurance or guarantee executed by the Secretary
under this subchapter shall be an obligation supported by the full
faith and credit of the United States and incontestable except for
fraud or misrepresentation of which the holder had actual knowledge
at the time it became a holder.