In Australia all work carried out by an electrician is required to be certified. That is to say, the electrician must, on completion of the work, hand you a certificate stating that all work is to the relevant standard. They can't reasonably withhold the certificate, and it must be provided on completion not on payment.

An organisation called TechSafe[1] is charged with carrying out random inspections.

1. https://www.techsafe.com.au/