So you want to know how to find out if your son's girlfriend is an old school girlfriend? It's easier than you think and a lot cheaper than you think too. You see, in modern days it is very easy to communicate with people using text or email, which is one of the reasons why finding out the truth about someone's background has become so easy. These days it is possible to carry out a background check on just anyone. All you need to do is go to Google right now and type in the person's name "old school girlfriend" and then it will tell you all sorts of information about them from their address to their phone number and even a full criminal record if they have one..