A written contract may be proven through any means of modern telecommunication (Telex, Telefax, btx, EDI etc.), if it provides a record of the information contained therein and can be reproduced in written form.
Doctrine
Berger, Klaus Peter, International Economic Arbitration, Deventer, Boston 1993Giovanoli, Mario, Télécommunications et Forme Ecrite dans les Contrats Internationaux, in: Mélanges Paul Piotet, Bern 1990, at 425 et seq.Goldman, Berthold, Nouvelles Réflexions sur la Lex Mercatoria, in: Festschrift Pierre Lalive, Basel, Frankfurt a.M. 1993, at 241 et seq.National Legislation
Czechoslovak International Trade CodeGIW GDRPrinciples / Restatements
UNIDROIT Principles of International Commercial Contracts 2016