FAR 46.504—Certificate of conformance.
Plain-English Summary
FAR 46.504 explains when a contracting officer may accept a contractor’s certificate of conformance instead of performing source inspection, even if the contract otherwise calls for acceptance at source or destination. The section covers the discretionary nature of that decision, the two core conditions that must be satisfied, and the requirement that using a certificate cannot waive or weaken the Government’s underlying inspection rights under the contract. In practice, this provision is a risk-based shortcut: it can reduce inspection burden and speed acceptance when the Government’s interest is served and the risk of defect is low or manageable. It is especially relevant where defects would cause only small losses, or where the contractor’s reputation and past performance make it likely that the work will be acceptable and any defects will be corrected without dispute. The section matters because it balances efficiency against quality assurance, allowing the Government to rely on contractor certification only when doing so is prudent and does not compromise contractual inspection protections.
Key Rules
CO discretion controls
A certificate of conformance may be used only at the contracting officer’s discretion. The contractor does not have a right to demand acceptance by certificate, and the CO must decide whether the approach is appropriate for the specific procurement.
Government interest required
The CO must determine that acceptance based on the contractor’s certificate is in the Government’s interest. This means the decision should support mission needs, efficiency, and acceptable risk, not merely convenience for the contractor.
Low-risk defect standard
The CO must find either that any defect would cause only small losses, or that the contractor’s reputation or past performance makes it likely the supplies or services will be acceptable and that any defective work will be replaced, corrected, or repaired without contest.
Past performance can justify reliance
A strong record of performance may support use of a certificate of conformance when it reasonably indicates the contractor will deliver conforming work and will promptly remedy defects if they occur.
Inspection rights remain intact
Using a certificate of conformance cannot prejudice the Government’s contractual right to inspect supplies. The Government does not give up inspection rights simply because it accepts a certificate in lieu of source inspection.
Applies instead of source inspection
The certificate may be used in place of source inspection whether the contract otherwise provides for acceptance at source or at destination. The key issue is not the location of acceptance, but whether the CO can lawfully and prudently rely on the certificate.
Responsibilities
Contracting Officer
Determine whether acceptance by certificate is in the Government’s interest, assess the defect risk or contractor reliability, and decide whether to authorize use of a certificate of conformance instead of source inspection. The CO must also ensure the Government’s inspection rights are preserved.
Contractor
Provide a truthful certificate of conformance when authorized, and stand behind the certification by replacing, correcting, or repairing defective work when required. The contractor’s reputation and past performance are part of the basis for the Government’s reliance.
Government inspectors / quality assurance personnel
Continue to exercise inspection rights when needed and support the CO’s risk assessment by providing information on product or service quality, defect history, and contractor performance.
Agency
Maintain acquisition practices that support informed use of certificates of conformance, including performance history and quality assurance information that help the CO decide when reliance is appropriate.
Practical Implications
This section can speed acceptance and reduce inspection workload, but only when the CO has a sound basis for trusting the contractor and the risk of defect is low.
Contractors should not assume a certificate of conformance eliminates oversight; the Government can still inspect and reject nonconforming work under the contract.
A common pitfall is using certificates too broadly without documenting why acceptance is in the Government’s interest or why the defect risk is acceptable.
Another risk is overreliance on past performance without current evidence; a contractor’s history should support, not replace, a present-day judgment.
COs should make sure the contract administration file reflects the rationale for using the certificate and that quality assurance rights remain fully preserved.
Official Regulatory Text
A certificate of conformance (see 46.315 ) may be used in certain instances instead of source inspection (whether the contract calls for acceptance at source or destination) at the discretion of the contracting officer if the following conditions apply: (a) Acceptance on the basis of a contractor’s certificate of conformance is in the Government’s interest. (b) (1) Small losses would be incurred in the event of a defect; or (2) Because of the contractor’s reputation or past performance, it is likely that the supplies or services furnished will be acceptable and any defective work would be replaced, corrected, or repaired without contest. In no case shall the Government’s right to inspect supplies under the inspection provisions of the contract be prejudiced.