How accurate DNA paternity test? DNA paternity testing paternity testing is the most accurate one. If children and men, the DNA test pattern in one or more of the DNA probe does not match, then the man will be tested to be 100% rule out that he is 0% may be the biological father, he can not be the child's father if the mother, child and father's DNA was tested fully in line mode, you can calculate the probability of 99.9% or greater., this result confirmed that he is actually the child's biological father completely. Most of the 90% probability of U.S. courts to accept as evidence of proof of paternity.