Open Book Account Open Account Offenes Buch Konto Open Book Account Cuenta de Libro Abierto Cuenta de Libro Abierto Compte ouvert חשבון ספר פתוח ओपन बुक अकाउंट オープンブック口座 Conta aberta 公开账户 An open book account is a type of civil claim where a plaintiff seeks payment for goods or services provided to a defendant on an ongoing basis, with the details of the transactions recorded in a book or other record that is open to inspection by both parties.