Necessary materials for paternity testing Paternity testing is an important scientific technology that can confirm the biological relationship between parents and children. Necessary materials for paternity testing include DNA samples, identity certificates, authorization letters, etc. The following will introduce in detail the necessary materials for paternity testing and how to prepare paternity testing samples from these aspects. 1. DNA samples DNA samples are the core material for paternity testing. Only by correctly collecting and analyzing DNA samples can we accurately confirm biological relationships. Generally, paternity testing requires the collection of blood samples, oral mucosal cell samples, or other tissues that do not contain blood traces such as hair and nails.