11(1)A certificate of the Commissioners—
(a)that a person was or was not, at any date, registered under this Act; or
(b)that any return required by or under this Act has not been made or had not been made at any date ; or
(c)that any tax shown as due in any return or assessment made in pursuance of this Act has not been paid ;
shall be sufficient evidence of that fact until the contrary is proved.
(2)A photograph of any document furnished to the Commissioners for the purposes of this Act and certified by them to be such a photograph shall be admissible in any proceedings, whether civil or criminal, to the same extent as the document itself.
(3)Any document purporting to be a certificate under sub-paragraph (1) or (2) above shall be deemed to be such a certificate until the contrary is proved.