Every trader is required to keep a daybook and a general ledger.
The journal book and ledger may, at the request of the trader, be quoted and initialled, in the ordinary form and free of charge, by the registrar of the court within whose jurisdiction the trader is registered. Each book is given an identification number listed by the registrar in a special register.
Documents in electronic form may take the place of journal books and ledgers; in this case, they are identified and dated as soon as they are drawn up by means offering every guarantee as regards proof.