About 10 days ago, someone came to my villa with a handheld. He said it would only take 5 minutes, but it took more like 20. Today, someone else came with his handheld. I told him somebody was already here about 10 days ago. He said all the data had been lost and they had to recollect it. ...and they expect valid results?

No, they ask for more than your ID. They take your cell phone number, your home phone number, and your work number.