You searched for: “substantiation
substantiation (s) (noun), substantiations (pl)
1. Validation; the truth found by confirmation: Some types of substantiation are a crosscheck, a redundancy check, a checksum, or a bed check in which each one has been verified as correct.
2. The act of verifying and corroborating something: Through substantiation or probate by the lawyer, the will was proven to be in accordance to the law of the country.