How to Verify a Gas Safety Certificate Online

A Legal Step-by-Step Guide from Fraser Bond

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.

What Is a CP12 Gas Safety Certificate?

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

Can You Verify a Gas Certificate Online?

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

How to Verify a CP12 Certificate Online – Step-by-Step

Step 1: Request the Certificate

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

Step 2: Use the Gas Safe Register to Check the Engineer

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.

Step 3: Review Certificate Details for Legal Compliance

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

Step 4: Ensure the Certificate Is Within the Valid Period

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.

Why Online Verification Is Critical

• 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’s Gas Safety Compliance System

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

Conclusion

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.