A Certificate of Airworthiness (CoA), commonly referred to as an airworthiness certificate, is granted to an aircraft by the civil aviation authority of the jurisdiction in which the aircraft is registered. This certificate serves as a confirmation that the aircraft is airworthy, meaning it complies with its approved type design and is deemed safe for flight. Upon registration in the owner's name, the certificate is categorized based on factors such as the aircraft's type and purpose.

To ensure continued airworthiness, owners are required to pay an annual currency fee for the renewal of the CoA. Failure to meet this financial obligation results in the expiration of the certificate, necessitating a fresh application by the owner. The issuance of a CoA is contingent upon the completion of required maintenance tasks, as indicated in a maintenance release or Certificate of Release to Service (CRS) from an authorized maintenance facility. This document declares that the necessary maintenance has been successfully conducted, and the aircraft is officially certified as airworthy. The careful adherence to these regulatory procedures is fundamental to maintaining the safety and compliance of the aircraft within the aviation framework.