Having some building done and part of it includes a dead test certificate.

What’s a dead test certificate when it’s at home? I’ve searched the internet and I can find a description of it, but nothing about what it looks like. Should the electrician have given me a piece of paper or something? I reckon it should be something along the lines of “all the cables pulled through and connected to switches by me look legit – signed A.N. Electrician” but the cables were pulled through by the builders so how would he know short of testing them with a meter or something?

The guy was a bit of a cowboy (claimed not to know how to wire a light switch, tried to fob me off when I told him a couple of lights should be wired independently and so on, but you get bad eggs in every profession I guess.