1. (a.) Giving a title or claim to credit or confidence; accrediting.

2. (n.) That which gives a title to credit or confidence.

3. (n.) Testimonials showing that a person is entitled to credit, or has right to exercise official power, as the letters given by a government to an ambassador or envoy, or a certificate that one is a duly elected delegate.

advocacy advocating advocation affidavit attestation authority authorization bill of health certificate certificate of character certificate of proficiency certification character character reference deposition diploma letter of introduction navicert notarized statement note patronage recommend recommendation reference sheepskin sworn statement testamur testimonial ticket visa vise voucher warrant warranty witness