African Union Legal Instrument 4. P a g e | 13 a) An electronic signature created by a secure device which the signatory is able to keep under his exclusive control and is appended to a digital certificate shall be admissible as signature on the same terms as a handwritten signature. b) The reliability of the procedure is presumed, unless otherwise proven, if the electronic signature is generated by a secure signature creation device, the integrity of the act is guaranteed and the identification of the signatory is ensured.