Non-legal paternity DNA testing is typically conducted for personal reasons, such as establishing peace of mind or confirming a biological relationship without the need for court involvement. These tests are usually performed in the privacy of one’s home using a simple at-home collection kit, but the results are not admissible in legal proceedings because they lack the strict chain-of-custody documentation. In contrast, legal paternity DNA testing follows a formal process where the sample collection is witnessed and documented to ensure the identity of the individuals involved. This chain-of-custody ensures that the test results can be used as legally valid evidence in cases related to child custody, child support, inheritance disputes, or immigration matters.