(1) A document in electronic form is sufficiently authenticated —
(a) if the identity of the sender is confirmed in a manner specified by the recipient; or
(b) where the recipient has not so specified, if the communication contains or is accompanied by a statement of the identity of the sender and the recipient has no reason to doubt the truth of that statement.
(2) A document in hard-copy form is sufficiently authenticated if it is signed.
(3) If a document is authenticated by the signature of an individual on behalf of —
(a) a body of persons, the document must also state the position of that individual in relation to the body;
(b) a body corporate of which the individual is the sole member, the document must also state that fact.