When a dispute arises regarding the identity of a child's father, a DNA test may seem like a simple and straightforward way to settle the matter. According to World Net Daily, though, between 14 and 30 percent of paternity claims are found to be fraudulent. It is easy enough to submit a lock of hair and wait for the results, but if the results contradict reality, you might be wondering what to do next. There are several reasons this might happen.