The Gas Safe certificate — what it proves and what to do without one
The short answer: certificates turn "I think the work was bad" into "the work skipped its legal compliance step". Check the official register for the tradesperson, order replacements where possible, and treat a missing certificate as evidence in your dispute.
REVIEWED BY: Sean McNamara on 2026-09-03
Gas work (boiler moves, hobs, fires) must legally be done by a Gas Safe registered engineer. You should receive a Gas Safe record after the work — check the engineer's licence on the register by their card number, not the company name. A missing record on gas work is serious: it is evidence of potentially illegal work, a free re-inspection route exists through Gas Safe, and it belongs in your evidence file.
Check the register
Gas Safe certificate — official register (verified 2026-09-03).
In a dispute
Attach certificates (or note their absence) in your letter before action and witness statement. At sale time, missing certificates cost real money — that diminution is claimable: schedule of loss.
Independent information directory — not legal advice.
This page is general information, not legal advice.
Reviewed by Sean McNamara · 2026-09-03 · Independent information directory — not legal advice.