Whether you’re a landlord, tenant, or buyer, verifying a CP12 Gas Safety Certificate is critical for property safety and legal compliance. But how do you check if a gas certificate is valid—and can it be done online?
Fraser Bond walks you through exactly how to verify a gas safety certificate online, including engineer checks, certificate review tips, and legal responsibilities in the UK.
A CP12 confirms that a Gas Safe registered engineer has inspected all gas appliances and pipework in a property and deemed them safe. UK law requires landlords to:
Conduct an inspection every 12 months
Provide tenants with a copy:
Before the tenancy begins
Within 28 days of any annual renewal
Retain the certificate for at least two years
You cannot verify a CP12 directly through a public certificate database, but you can confirm:
Whether the engineer is properly registered
Whether the certificate was issued within the legal timeframe
That the certificate includes all legally required details
Whether you're a tenant, buyer, or agent:
Ask the landlord or gas engineer for a digital copy (PDF)
Ensure it lists:
The property address
Date of inspection
Appliances tested
Engineer’s name and 7-digit Gas Safe licence number
Visit the official Gas Safe Register website:
Click “Check an Engineer”
Enter the 7-digit licence number from the certificate
Confirm that:
The engineer is actively registered
Their registration is not expired
They are certified for the type of work listed (e.g., boilers, flues, pipework)
Tip: Also check the “Check a Business” tool if a company issued the CP12.
Make sure the CP12 includes:
The correct property address
All appliances present in the property
Notes confirming pass/fail results of each safety check
The engineer’s signature and Gas Safe number
Clear inspection and expiry dates
A gas safety certificate is valid for 12 months from the inspection date. If the certificate is older than that, it is no longer legally valid—even if everything passed.
Avoid illegal or dangerous gas work
Ensure tenant safety and legal protection
Protect insurance coverage (invalid CP12s may void property claims)
Satisfy property buyers, agents, or auditors during transactions
Fraser Bond makes gas certificate verification and storage simple and secure:
We work only with Gas Safe registered engineers
All CP12s are stored digitally and made accessible to landlords and tenants
Automatic alerts are sent before certificates expire
Full documentation is available for audits or insurance claims
While you can’t search for a gas certificate by address, verifying a CP12 online is simple and essential. By requesting the certificate and checking the issuing engineer via the Gas Safe Register, you can stay compliant and avoid serious legal or safety risks.
Need help managing or verifying a gas safety certificate? Visit Fraser Bond today.
