US government action to prevent companies and individuals from conducting business with the federal government. One federal agency's decision to debar a company or individual applies to the entire government. Debarment can be based on, among other things:

For a complete list of causes for debarment and suspension, respectively, see 48 C.F.R. § 9.406-2 and 48 C.F.R. § 9.407-2. For more information on suspension or debarment from government contracts, see Practice Note, Acquiring a Federal Government Contractor: Avoiding Pitfalls.