I tried to get a replacement completion certificate for my old house, it transpires it would take 6 months and cost was how long it would take them to find it, seems buyer were not really bothered, and then found old certificate, however it means in real terms if I say I have lost it, no one can prove it was never issued.
As to the installation certificate, can't see how it can ever be invalid? The IET (was IEE) has forms for down load on their web site, and anyone can complete an installation certificate there is no requirement to be in any scheme, if a scheme member then you would get a compliance certificate which I assume is linked in some way to the installation certificate, however since you have a completion certificate there would have been no requirement for the installation certificate to be linked to a compliance certificate, nor would it be held by any scheme operator, the county council would be the only people who would validate it.
Having gone through the completion certificate route, I was surprised to find my copy of the installation certificate was not endorsed in any way, only way to show what the completion certificate relates to would to be getting a copy from LABC and as said I failed to be able to get copies from them. So I could fill in a certificate today from records kept on my PC, and could include anything I wanted and there is it seems no way of saying if the installation and completion certificates actually relate to each other.
I had no need to cheat, whole house got rewired after I had done work on wet room, however it became very clear I could have done, only way to ensure some one has not cheated is to get copy from the council, and since the council never visited to check my work, even that is a bit useless, then and now they only have my word for it, that it was OK.
I am sure if there was a death due to faulty wiring then they would find out the original, however house was covered by three certificates, kitchen, wet room, and rest, so it would be near impossible to show who made the errors anyway.
Only way an installation certificate can be invalid is signature missing, the
death of Emma Shaw says how the electricians mates name was entered on the typed copy of the certificate, and it is clear he did not sign it, it was typed in, been some time since I have read through the report, but clearly the HSE went to great lengths to find the truth, and it really did not matter what was on paperwork, they worked out who had done what, from electrician who installed the cables, to plaster who damaged cables, to electricians mate who made a botched job of testing cables, to plumber who failed to glue tun-dish, and electrical foreman who sent the electricians mate to do testing. They got the whole story, and this was before 17th Edition came in, so at that time no RCD protection, done 2006.
But if I got a scrap of paper and simply wrote on it wiring done Dec 2004 to 16th Edition and signed it, i.e. the bill, it is still technically an installation certificate, not a very good one, but there is no law to say one even has to be made out, so it can hardly become invalid, all the law needs is the completion certificate.
When Part P came out I expected the LABC to follow the industry standard and issue permits to work, and endorse the home owners copy of the installation certificate with a unique number and reference to completion certificate with a LABC stamp seen and approved or similar, however it became clear it is nothing more than a tax.
It seems LA social services are taken to task for not looking after baby X, but LA building control seem to be able to blame any faults on the builder, you watch builders from hell, and one thinks why did the LABC allow it to happen, they are paid good money to over see the building work, but seem to get away with it if they miss some thing, even massive mistakes where whole housing estate built 4 foot too low, so when culvert blocked houses flooded before the water could find an alternative route over the road, in spite of the requirement being on the plans. 6" maybe simple error, but 4 foot too low, clearly never checked.
So what did the person said made the installation certificate invalid?