I had a census worker come to my home back in the summer. Since I did not recognize his vehicle I did not go to the door. He left a card and I phoned. I made an appointment for him to come to the house. He had a badge and a laptop which he entered the information into. The whole process only took about 5 to 10 minutes. I don't really even remember now what info I gave him but it wasn't anything to be alarmed about. He was professional and courteous. No biggie.