An electrician cannot sign off on anything specially someone else's work in this context, full stop.
- If a licensed electrician does the work they need a notification (permit) and the ESA inspects the work (service, rough and final) and "signs off", notification must now be under a licensed electrical contractor not just a licensed electrician.
- If a homeowner does the work (DIY) they need a notification (permit) and the ESA inspects the work (service, rough and final) and "signs off".
If the homeowner pulls the ESA notification they must be an adult living in the house and they must do the work with only other people living in the house, they cannot (by the rules) then sub the work to an electrician, handyman, buddy, hack, drunkard, whatever. Service inspection is if a new service is part of the deal, if not rough and final only. All this is in the context of work/changes being done, by all means an electrician can look stuff over and say if it is bad or good but it is not signing off on anything.
Building inspectors etc. do not inspect electrical or the other way but there can be some overlap like wired fire alarms etc.