How to file for paternity if the father lives in Germany ?

There's nothing you can do to force a German national prove he sired your son.

Unless and until he submits to a paternity test, your son isn't his son.

You might never get him to establish paternity, and pay child support.

Now you've learned a valuable, but extremely painful lesson that you might have to one day tell your son.

The state might be able to assist you, but even that's doubtful as the alleged father is a German national.

It's all very sad, especially for the innocent, precious child.

I wish you and your son the best, and I hope the state child collection apparatus is successful in helping you at least establish paternity for your child.