e. As being authoritative or duly authorized, as being what it professes
in origin or authorship, as being genuine. [Archives] 
n., The quality of a document of having the character and authority of the original. [Archives] 
n., In Jenkinson’s formulation, the quality of archives deriving from their being preserved in the continuous custody and for the
information of their creator and its legitimate successors. [Archives] 
n., The quality of archival documents to bear authentic testimony of the actions, pro