One who certificates.

(UK) The act of an employee certifying that he/she was absent from work due to sickness, and is eligible for statutory sick pay.

plural of self-certification

An official document certifying the details of a person's birth. Name, date, and parents' names are always present; details such as parents' occupation and religion may be included.

Alternative form of birth certificate

(computing) An organization that issues digital certificates for use by other parties.

(computing) a public key certificate

A type of bank account representing a time deposit, which is insured, with a specific, fixed term, and, usually, a fixed interest rate.

plural of Leaving Certificate

A medical certificate.