The chain of custody process allows for the legal DNA test results to be legally defensible in courts and other government agencies. It involves three main aspects:
- The tested parties are properly identified when their samples are collected. (Their government-issued IDs are verified and photocopied.)
- The DNA samples are collected by a neutral third party—someone who has no personal interest in the outcome of the test (e.g., a hospital, clinic, or laboratory staff person)
- The samples are securely packaged at the collection site, and carefully inspected upon receipt for any evidence of tampering
When these requirements are satisfied and documented, the results are legally defensible. This means that the patients can use them for legal purposes such as child custody, child support, immigration, etc.