Section 19.153 - Bond guaranteed by a corporate surety(a)Corporate surety. A company that issues bonds is called a "corporate surety." Proprietors must obtain the surety bonds required by this subpart from a corporate surety approved by the Secretary of the Treasury.(b)How to find an approved surety. The Department of the Treasury publishes a list of approved corporate surety companies in Treasury Department Circular No. 570, "Companies Holding Certificates of Authority as Acceptable Sureties on Federal Bonds and as Acceptable Reinsuring Companies." Circular 570 is published annually in the FEDERAL REGISTER. The most current edition of the circular is posted at the Web site of the Financial Management Service, Department of the Treasury at http://www.fms.treas.gov/c570. Printed copies of Circular 570 are available for purchase from the Government Printing Office.