All you had to do was ask the contractor to show you their papers. He would have left that day and you can guess why. A restaurant and your own back yard aren’t comparable.
I did the very thing when a young guy,very professional, quoted a tree trimming job on my huge maple,he said he could get on it right away.....the crew jumped out of a van and I promptly asked him if they were citizens....he closed up his contract book and left without saying a word. Pretty easy stuff!
Put your hand on a Bible, please, and swear to The Almighty that you have never ever had any illegal immigrant ever serve or cook your food, or wash your car, or stitch your clothes, or process any steak or burger you've ever consumed.
Do you -- before you buy a piece of meat at the local grocery store -- call the butcher company (hey, the name and phone number is right there on the package) and ask for documentation proving they don't have any illegals?
Do you, prior to buying an automobile, write to the manufacturer demanding documents proving they don't have one single illegal immigrant under their employ??
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(crickets chirping........)
The contractor could get sued showing you their papers.