A document purporting to have affixed or impressed on it or subscribed to it the seal or signature of a court, judge, notary public or person having authority to administer oaths in England and Wales, Scotland, the Republic of Ireland or any part of the Commonwealth in testimony of an affidavit being taken before it or him in such place shall be admitted in evidence without proof of the seal or signature being the seal or signature of that court, judge, notary public or person.