Scientific study of biological paternity is a special case of genetic relationship determination between individuals, based on simple mendelian inheritance principles of genetic markers, which establish that the alleles are segregate independently and discreetly during meiosis. The most common analysis of forensic biological relationships evaluation is the paternity test, which the genetic profiles of two individuals (or three if the mother is available) are uses to compare the relative probability of that one of them being the father against the probability of not is ancestrally related to the other analyzed individual. The short tandem repeats (STR) are the commonly used unlinked genetic markers for relationship evaluation due to their high polymorphism. Besides, the results usually favor the determination of the relationship when a robust statistical analysis is applied. The short tandem repeats analysis is typically by the polymerase chain reaction (PCR), using multiple short tandem repeats loci on commercial platforms, which are efficient and with high discriminating power. This review describes the current state of DNA paternity test, the methodology, the results report, and the interpretation, to facilitate their understanding to related professionals with these types of analysis.