In Oregon, we have Oregon Construction Contraction Board.
If seniors are not doing their homework and research well, that's WHEN they get ripped off.
I've hired & fired construction to work in my home for 44 years (since the day we bought a house), and I started putting them on a notebook, construction companies I WILL NEVER HIRE again, before there was an Angie's List, there was a Sur La Mer's List. Thanks to an Excell sheet, my list is a mile long! I keep updating it, each time I get a new hire, if they're license, if they're active, suspended, etc. It's like a background check on them, and watch out for construction with several company names.
NEVER hire someone recommended by another neighbor or friend, just because they did work for them, WITHOUT doing your homework! AND hire someone who wants you to pay in full UNDER THE TABLE.
BTW: anyone can find forms online to make them look . . . official, that they're legit.
I've had a few who try to do this & that to me, they think. I was born yesterday! And be home to SUPERVISE them, yes, supervise them!
(I've had one sleeping inside my garage, with the door closed, while his partners took off for food).
We were getting a porch addition, and our contractor asked me which do I prefer: tongue in groove ceiling or paneling. I said tongue in groove. Then came back and told me: they didn't have any in stock at the lumberyard and substituting with paneling (trying to save me bucks here & there). That 1st week, we have rain, and the paneling warped! He had to replace all the ceiling! There's more problems one after another, so supervising them, and being a know-it-all, prevents you from going to court!
The last time we try to hire someone, my husband is retired by now, and he wanted to hire them without READING reviews on YELP, or searching for their license, to do our roofing. Do your homework! This is now August, and we're postponing it, because all the ones who came to give us estimates . . . I'm not happy with them.