8. Where a rule of law requires a signature, or provides for certain consequences if a document or a record is not signed, that requirement is satisfied in relation to an electronic record if —
a method is used to identify the person and to indicate that person’s intention in respect of the information contained in the electronic record; and
the method used is either —
as reliable as appropriate for the purpose for which the electronic record was generated or communicated, in the light of all the circumstances, including any relevant agreement; or
proven in fact to have fulfilled the functions described in paragraph (a), by itself or together with further evidence.
[UN, Art. 9(3)]