certification

(noun) the act of certifying or bestowing a franchise on. Synonyms: enfranchisement.

(noun) confirmation that some fact or statement is true through the use of documentary evidence. Synonyms: documentation, corroboration.

(noun) a document attesting to the truth of certain stated facts. Synonyms: certificate, credential, credentials.

(noun) validating the authenticity of something or someone. Synonyms: authentication.