In regards to illegals, they are not here alone, that is, someone is helping them, so they are not trying to hide.
My job involves helping people get jobs, so at least 2/3 of my clients have records a mile long. They often want to start over and it used to be fairly easy till after 9-11. Now it’s much harder.
When you say disappear, it often depends on how hard anyone is looking for you. I have people who are nearly 50 who have never had a “regular job.” They have been prostitutes, drug runners, thieves etc, etc and they want to “go straight.”
It’s very common for them to have no contact with anyone simply because no one wants to know them anymore.
As for businesses paying cash, it’s more common than you’d think. In fact one of my biggest issues was people, very high end people, wanting to pay cash, to essentially screw the employees over and cheap out. Working for a non-profit and we accept referrals from the state, we have to be 100% straight up, but the employers never quit asking.
Illegals pull it off because they can simply use a “friend’s” social security and the friend gets the benefits and the illegal will pay the taxes or give the money to the “friend” to pay and everyone is happy. You open a credit card in your friend’s name and pay it and again everyone is happy as long as it’s paid timely, which usually doesn’t last more than a year or so.
As for a birth certificate, I got a copy of mine from the state I was born and they don’t use a seal anymore, you have an electronic verification mark on it. My original one has a seal but that was decades and decades ago.
Another problem I have is the fraudulent use of SS# by parents. It’s very common for me to have clients referred from state job programs and their parents have used their SS# to open credit cards or get loans and then default. I recently had a rough background strive to get a college degree and come to us for help only to find, his credit was the pits and it was either accept it and declare bankruptcy or go to the law and result with having his mother arrested for fraud.
So yeah, if you want to leave and go to a big city, you could easily get by if you had a “friend” that was willing to help you or you could pay someone to take that risk.
But even then you may be recognized by someone, or get to comfortable. I say that because one of my most interesting cases was 20 some years ago, we handled a man, who seemed to be rather educated (not common for our organization), and placed him in a company at a low level job. He worked there and rose through the ranks and did quite well. A couple of years ago the company was bought by another company, and it was done in such a way, where nothing was really changed except the company’s name on the check. The new company did background checks and he was prison escapee. It was caught very quickly once someone decided to actually look. Apparently the company didn’t check very well when he was first hired as it was a low level position.
So it just shows that even if you do manage to “get away with it,” you’re always going to be looking over your back