Paternity Testing Corporation (PTC) is the industry leader for reliability in paternity testing. In addition, PTC is one of the few US paternity laboratories capable of performing the RFLP type DNA testing, which provides essential information to obtain reliable answers in difficult cases such as; DNA mutations or testing extended family members without alleged father's specimen. PTC voluntarily includes additional procedures to make sure that we do not issue false negative or positive test results. PTC provides paternity testing on over 40,000 individuals each year. Scientists affiliated with PTC are at the forefront of international research in DNA testing. Our staff will take the time to carefully explain the process and answer any questions you have about testing. PTC has over 2,000 specimen collection locations in the US. Even if the tested individuals live in different states, PTC can generally collect specimens at different locations to prevent any need for travel.