What happens when you sign off a boiler! Within 4 weeks, the home owner gets a notification licence from GSR, the document encourages the household to invite GSR for a free inspection. Suddenly your back side is up for a chance that the household doesn't call GSR in, day and night you'll be praying to God, there will be no dispute for as long as that boiler is on the wall, because I tell you, no matter how thorough you think you've been with your checks, GSR will find something wrong! Do I need to go on describing the rest!
I've had an un informed inspection from gas safe and would happily let them do it again. Didn't find anything wrong. Im sure they could have if they wanted to but they aren't out to string you up by your balls. Again it comes down to education. How many customer know about the notification process, or the consequences of not receiving one?
How about the customer applying for a notification prior to the job being completed, then the installer self certifying that installation using some unique number on the notification. If the customer doesn't receive confirmation of it they can chase the installer, or better still gas safe can do that. The system as it stands is flawed because the installer has all the cards and keeps the notification secret to an unsuspecting customer.