Fixing of Seal and Proof of Instruments
13The fixing of the seal of the Post Office shall be authenticated by the signature of the secretary of the Post Office or of some other person authorised, either generally or specially, by the Post Office to act for that purpose.
14A certificate signed by the secretary of the Post Office that an instrument purporting to be made or issued by or on behalf of the Post Office was so made or issued shall be conclusive evidence of that fact.
15Every document purporting to be an instrument made or issued by or on behalf of the Post Office and to be duly executed under Uhe seal of the Post Office, or to be signed or executed by the secretary of the Post Office or a person authorised by the Post Office to act in that behalf shall be received in evidence and deemed, without further proof, to be so made or issued unless the contrary is shown.