Arizona contractors: check the licence before work starts
Arizona licenses contractors at state level. The Arizona Registrar of Contractors licenses contractors and lets the public look up a contractor's licence on its website, roc.az.gov. (Source: Arizona Registrar of Contractors, roc.az.gov.)
Look up before you sign. Search the contractor's name or licence number and check that the licence is active.
Ask for the quote in writing. Scope, price and timeline on paper protect both sides.
If you're the contractor. Put your licence number in your listing; customers who check it are customers who trust you.