Need to file a small claim for a contractor, but don't have the address. What to do?

We are looking into taking our ex-contractor to small claims, as he did not finish a job he was supposed to. We have a licence number, phone number, name, but no address. From what I understand, I need an address to send him a certified letter letting him know we're taking him to small claims. What can I do if I don't have an address? He doesn't have an office, as he does his work out of people's homes. Thank you in advance. I really need advice.

2 months ago - 1 answers