ExH did a long time ago. He knew BM had cheated around when BM got pregnant but allowed himself to be convinced SD was his.  BM moved illegally and I needed to be sure before we spent a fortune trying to bring her back. SD was 5 and exH was too attached to risk nor seeing SD at all.  Worked great. SD was exH's BTW. 

According to Dr. Gupta of CNN, they are 99% accurate.   Get one immediately.  

Get one through the mail.  But do not...and I mean do NOT tell anyone your son had it done.  At least you will know what direction to take.    

This is reeking of trap baby. Already tlaking about "doing this right." Get the paternity test. REALLY enforce that marriage isn't always the best option and you should NEVER get married for a kid.

This is basically what my DHs ex did. First said it was his, then admitted it could be 2 other guys also, years later he found out it was actually 3 other possibilities. Guilt tripped him into being there the whole pregnancy and birth (hoping he would get attached and stay if it wasnt his) because it was "probably" his and never even told the other guys about the pregnancy. The first thing she said after telling him about it was crying "but I would marry you!" Even though they were broken up. 

I would definitely get a DNA test and tell him not to marry her. If she is that selfish and messed up in the head that she will create another life and completely change the course of his life just to get her way it isn't going to turn out well. Marriage just adds another layer of complications. And dont have him sign the birth certificate, its legally binding and shoukdnt be signed if there is any doubt. He can be added to it later if he is bio dad.

And dont have him sign the birth certificate, its legally binding and shoukdnt be signed if there is any doubt. He can be added to it later if he is bio dad.

^^^^^^^^^Absolutely all this! Please talk to your son first. Don't allow him to be guilted into something that may not be true. Get this test done so everyone can move on with their lives. Also, is this unstable girl the type of person he would like to commit to?

My mom used one to prove her biological father. He is in a nursing home and she was put up for adoption. His name was never listed. Once we finally tracked him down- only took 20 years after she found her bio-mom's family (BM was already deceased), my mom's 1/2 sister swabbed their father at the nursing home and we had results within a week. It was pretty easy and let eveyone on that side of the family feel at ease that my mom wasn't some crazy person trying to get money from them or their dad. 

Did the man in the nursing home give consent to have his dna taken from him?

Glad your mom found her bio dad.