Are you going to accept responsibility for someone's work that is now conceiled behind the drywall?. Ok I will bite- Do the job for cash. Wear a fake mustache and a fake beard. Make up a phony name for yourself and drive up in a rented car. Wear latex gloves so you don't leave fingerprints. Ask up front for $100,000 dollars.
I have only done one job like this. The electrical contractor ran off and quit on the contractor. Make sure you have detailed documentation on anything you see and all work you perform. Make sure your contract states you are only providing a warranty for your work and are not responsible for anything but your work. Daily work equals daily pay......in cash. Make sure to add alot of markup for the hassles that may come later.
If the rough work looks perfect, do it and write on the invoice "XX Electric not reponsible for work done by others". If the rough work looks any less than perfect, walk away from it. Don't be shy about taking pictures, or having the homeowner sign something about the rough being done by an EC.
In this area most journeymen use conduit, most weekend warriors use NM, so it's easy to tell. Otherwise, I'd look for all bracket boxes with rings, and no small boxes.
Showed up at something like that today.... New client/GC wants us to pick up "punchlist" from an EC he found out was unlicensed, and disappeared. Got there and there is wire hanging out everywhere, no make up on grounds, small boxes, over-packed, un-marked panel, no AFCI's, etc. And, the real kicker, NO GROUND OR BONDING AT ALL ON A NEW 200A SERVICE.
Telling the boss tommorrow we should have no more to do with the joint! Or start over...
Mark Heller "Well - I oughta....." -Jackie Gleason
I was reffered to job by rocker. Gc is owner contractor. House is big and in expensive area on a hill here in Ca. Gc said he moved from Conecticut and electrician was from there too. Work looks ok as long you see in boxes. Breakers has been installed and wires in panle marked. I asked Gc that if it has been tested. He said no. Also told him that I will not be responsible for rough. He said ok. I never done it before seperate. My own rough and finish. Thats why asked experts advise. After all liabilty is involved in any way after I touch it.