Most boiler manufacturers are now requiring a Benchmark Checklist to be completed by the installer. Without it, the warranty is void. www.centralheating.co.uk/benchmark-member-scheme
I only found out about this when my new boiler documents were handed over. Guess what? the installer has not completed the checklist. Now wondering if I should not pay him until he's done it.
The Benchmark scheme is voluntary for the installer (they have to pay £35pa to belong to the scheme). It is supposed to weed out cowboy installers, but to me it looks more like a way for manufacturers to avoid warranty responsibilities. I don't see how it can help consumers if they don't find out about the scheme until after installation. Anyway, I'm now on collision course with the installer.
Judging from another thread about boiler installation certificates, the lack of documentation is something a potential housebuyer may try to bargain house price down with