How to Verify a TR19 Cleaning Certificate Is Genuine

Why the paperwork matters more than the badge

TR19 Grease is the specification published by BESA, the Building Engineering Services Association, for managing fire risk in commercial kitchen extraction. It replaced the kitchen-specific guidance that used to sit inside the broader TR19 document, and it is the benchmark insurers and fire risk assessors now expect you to meet. The important shift to understand is that compliance is not a certificate you buy - it is a standard of work you can evidence.

That distinction becomes very real after an incident. If a fire starts in or spreads through a grease-laden extract system, your PCVR will be examined forensically by expert witnesses acting for insurers. They are not looking at whether a certificate exists; they are checking whether the report genuinely proves the whole system was cleaned to the standard on the date claimed. A one-page certificate with a logo, no photographs, no grease readings and no drawing tells them almost nothing - and a claim can be challenged or refused on exactly that basis. Some insurers now reference TR19 Grease directly in their conditions of cover, which is why a thin certificate is a liability dressed up as reassurance.

The single most common weakness is silence on whether the system was cleaned in its entirety. Real kitchens are awkward. Long horizontal duct runs, sealed risers and fans on the roof often cannot all be reached through the access that exists, and a professional says so in writing. A report that quietly implies a perfect clean while leaving whole sections unmentioned is more dangerous than an honest one that flags an unreachable run and recommends new access panels - because the honest report protects you, and the flattering one exposes you. If every certificate you have ever received shows a spotless system with no caveats, treat that as a warning sign rather than good news.

Photographs are where a genuine report earns its keep, and where weak ones fall down. Matching before-and-after images from the same position let you see grease actually removed from the same length of duct, not a tidy shot of a filter that was never the problem. Be wary of stock-looking images, photos with no location context, or an “after” set that conveniently avoids the parts hardest to clean. The grease readings do the same job in numbers: a deposit thickness recorded at named test points, before and after, is far harder to fake than a signature. If a certificate quotes no measurements at all, there is no objective proof anything changed.

Frequency is another quiet tell. TR19 Grease does not set one blanket interval for every kitchen; it links the recommended cleaning schedule to how hard the extract system works. A heavy-use operation running long hours on chargrills and fryers may need cleaning several times a year, while a light-use kitchen might reasonably be assessed as annual. A genuine report explains the interval it recommends and ties it to your cooking load and the grease readings taken on the day. A certificate that simply stamps “clean annually” on every site, regardless of how the kitchen is used, has not really assessed your risk - it has applied a default. If your usage is heavy and the paperwork still says once a year with no reasoning behind it, that gap is worth questioning.

It is also worth knowing what a certificate is not. A hygiene certificate confirming the visible kitchen surfaces were cleaned is not a TR19 Grease extract certificate. A general air hygiene report to the ductwork standard for offices and comfort ventilation is a different document again. If you want to be certain a specific piece of paper covers your extract system and holds up, our guide to what a genuine extraction cleaning compliance certificate should contain walks through the same requirements from the certificate’s side.

Finally, verify the source, not just the document. Ask which operative did the work and confirm the qualification. Check the contractor against the Vent Hygiene Register rather than taking a logo at face value - membership badges are easy to copy, register entries are not. Where a clean has been logged through BESCA, you should be able to point to the independently generated certificate rather than one produced solely in-house. A contractor doing the job properly will welcome these questions, because the whole point of a verification report is that it can be checked.