Background screenings undertaken for the purpose of employment or rental decisions have federal regulations which you need to follow. You should hire an experienced agency to conduct an employer or landlord related search.
Most basic verification services don't require you to have a lot of data to begin with. But the more you have, the better the data you receive will be.
The minimum you should have would be a full name, city and age. A Social Security Number will allow you to get a much nicer background report.