A Gas Safe certificate number is the unique reference assigned to a Gas Safety Record (CP12) after a qualified engineer inspects gas appliances like boilers, cookers, or fires. This number helps track the validity and issuance of the certificate, and is usually recorded:
On the CP12 document itself
In the digital certificate file (if issued electronically)
By the Gas Safe engineer or business that performed the inspection
▶️ No, the certificate number itself cannot be verified via a public government database.
Unlike the EPC Register, the Gas Safe Register does not provide public access to certificate records or certificate numbers.
However, you can still verify the legitimacy of a gas safety certificate in the following ways:
Use the Gas Safe Register’s engineer verification tool:
