If the business they were working with was in the building, good luck finding the records.
some address or phone listing,or a shop or business office to confirm that there actually is a Denko Mechanical, other than what is on the previous reply.
Not necessarily. Many tradesman outfits work out of their trucks and work onsite. No shop necessary--the "shop" is a van.
How many businesses have no listing in a phone book?
Mine doesn't. A lot do not, because they don't have time to waste answering the phone--they're too busy working for paying customers.
Isn't that bad for business?
If the order book is full, advertising one's existence in the phone book means that you are inviting time-wasting phone calls. ("No, sir, we are not accepting new clients at this time. Good day, sir.")
This is from switchboard.com
I would suspect there should be some record of such a business on the tax rolls somewhere,even if there is no shop. The law requires most companies to pay in social security taxes and worker's compensation premiums foe employees.