A certificate of making good defects (also known as a defects certificate) is typically issued at the end of the defects liability period. The certificate confirms that any defects or snagging items identified during the defects liability period have been rectified and that the building and/or site is now free of defects.

The certificate is usually issued by the Contract Administrator and is a pre-requisite for issuing the Final Certificate and final payment to the contractor. It is an important document that demonstrates that the building has been completed to the required standard and that the contractor has fulfilled its obligations under the contract.