Equitable Surety Co. v. United States Ex Rel. McMillan

Background\n\nA contractor agreed to build a public building in the District of Columbia and gave a statutory bond with a surety company guaranteeing performance and payment to people who supply labor and materials. The law at issue was modeled on an earlier federal statute that lets suppliers sue on the bond because mechanic’s liens are not available for government work. The contract was later changed—moving the building’s position and changing grading—without any clause shown to permit such changes, and a supplier sued on the bond for unpaid materials.\n\nReasoning\n\nThe Court considered whether changes made between the Government and the contractor without the surety’s consent free the surety from responsibility to suppliers when the changes do not alter the general character of the work or the materials needed. The Court explained the bond serves two purposes: to secure the Government’s project and to protect third‑party suppliers. Because the Government is only a nominal trustee for suppliers and the bond is a public obligation, allowing the surety to escape liability for ordinary, non‑substantive modifications would defeat Congress’s purpose. The Court therefore held the surety remains liable for claims tied to the original contract’s work and materials, while noting that truly wholesale substitutions of the contract might present a different question.\n\nReal world impact\n\nSuppliers and laborers on District public building projects can rely on statutory bonds to collect for materials supplied under the original plans, even if non‑substantive modifications are made. Contractors and sureties must recognize that routine changes do not automatically free guarantors from supplier claims. The Court answered the certified question in the negative, resolving liability in favor of the suppliers for the facts presented.\n\n