Digital Signature 41 (2) Where the recipient determines not to rely on a digital signature under this section, the recipient shall promptly notify the signer of its determination not to rely on a digital signature and the grounds for that determination. Digitally signed message deemed to be written document 64. (1) A message shall be as valid, enforceable and effective as if it had been written on paper if— (a) it bears in its entirety a digital signature; and (b) that digital signature is verified by the public key listed in a certificate which— (i) was issued by a licensed certification authority; and (ii) was valid at the time the digital signature was created. (2) Nothing in this Act shall preclude any message, document, or record from being considered written or in writing under any other applicable law. Digitally signed message deemed to be original document 65. A copy of a digitally signed message shall be as valid, enforceable and effective as the original of the message unless it is evident that the signer designated an instance of the digitally signed message to be a unique original, in which case only that instance constitutes the valid, enforceable and effective message. Authentication of digital signatures 66. A certificate issued by a licensed certification authority shall be an acknowledgement of a digital signature verified by reference to the public key listed in the certificate, regardless of whether words of an express acknowledgement appear with the digital signature and regardless of whether the signer physically appeared before the licensed certification authority when the digital signature was created, if that digital signature is— (a) verifiable by that certificate; and (b) affixed when that certificate was valid.