A surety company (Lumbermens Mutual) sued the federal government for payment on a Miller Act bond, claiming the government improperly paid the contractor and damaged the surety's position. The Federal Circuit Court ruled that the government has sovereign immunity—meaning it cannot be sued—for certain surety claims, particularly those based on "impairment of suretyship" theories. The court also said that surety claims must follow the Contract Disputes Act (CDA) process, not just the Tucker Act. This limits sureties' ability to recover directly from the federal government when contractors fail.
If you're bonded and the contractor fails on a federal project, you cannot sue the government directly for impairment of your surety position—the government has immunity from those claims.
Surety claims against the federal government must follow CDA procedures (written notice, claim submission, appeal process) rather than going straight to court.
Focus your recovery efforts on the contractor and the project funds, not on suing the government for allowing improper payments to the contractor.