Just write down ALL test results. Yes people will say "that will take ages" but if your testing like you are supposed to be then yes it takes ages. That's why it costs, you pay for someone time to do it properly and with a full set of test results signed off, you are accountable and the electrician is covered, assuming he hasn't made them up. If he made them up and there is problem he has those signed off/made up (delete applicable) to come to back to which will either burying him(if he made them up) or cover him (if they were tested the right way).

Have folders full of scribbled down test results in my own test sheet which I have kept just in case. The info you put on the COC is not enough. You just put in the worst case scenario for earth continuity? What good is that. If there was ever any dispute I don't think you would remember at what point you tested for that single number. Also with Eskom messing around with things I have had an incoming earth vanish after they dug up the road to connect a new supply and didn't reconnect properly. Careful what you sign people.... It's like signing a document when all the terms and conditions are not checked.