(1) The provisions of sections 126, 126a or 126b also apply, in case of doubt, to the form specified by legal transaction.
(2) For compliance with the written form required by legal transaction it suffices, unless a different intention is to be assumed, for the message to be transmitted using means of telecommunication and, in the case of a contract, by the exchange of letters. If such a form is chosen, notarial recording in accordance with section 126 may be demanded subsequently.
(3) For compliance with the electronic form required by legal transaction, unless a different intention is to be assumed, an electronic signature other than that provided for in section 126a also suffices and, in the case of a contract, the exchange of a declaration of an offer and of acceptance that are each provided with an electronic signature. If such a form is chosen, an electronic signature in accordance with section 126a may be demanded subsequently, or if this is not possible for one of the parties, notarial recording corresponding to the stipulations of section 126.