Or, do your own verification on the internet. A master or journeyman electrician's license type and number must be shown on any sign, listing, or advertisement. Ask to see a copy of the licensee's liability insurance. Insurance is required by state law and reputable professionals carry it. Get more than one bid for your job.
Competition promotes fairness.
Get referrals from friends, family or neighbors. Contact a trade association for a list of member companies in your area. Agree in writing to the scope and price of the work to be completed. Ask to see the permit. This permit is your guarantee that the work will be inspected and that the professional is responsible for the work performed.