How do I know if he is the father or not?

The DNA Paternity Test will provide a conclusive answer regarding whether the tested man is the true biological father of the child.

What will the report show if the test man IS the true biological father:

If the tested man is the true biological father of the child, the "Probability of Paternity" value of your report will show >99.99% that he is the father.

What will the report how if the tested man is NOT the biological father:

If the tested man is not the true biological father of the child, the "Probability of Paternity" value of your report will show 0% that he is the father.

Look at the "Probability of Paternity" value of your report. Your report will show either 0% if he is not the father, or else it will show a number that is >99.99% if he is the true biological father.