Probability Of Paternity Index
There could be many mismatches, but it takes only two or three mismatches to exclude the alleged father to be the biological father. Even if there are three matches, it does not necessarily imply that there is a paternity relationship. Any two people can easily have quite a few matches. In case of a father-child, there will be matches at all locations.
The guidelines of DNA paternity accreditation demand that there be a CPI value of more than a 100, and the probability of paternity should be greater than 99.0%. AN accredited paternity test report is required by most child support agencies, courts and other legal entities, while in the case of an immigration, the required CPI value is needed at least a 200 (99.5%), or more.