Special type of documentary credit where in addition to the payment undertaking of the importer's bank an undertaking is also given by the exporter's bank (or a third-party bank, e.g. the World Bank or an international development bank) in order to provide the exporter with additional security. This second undertaking to pay acts as a safeguard against risks that may stem from the importer's bank (country risks and/or bank risks) or the importer's country (e.g. the risk of a moratorium on international payments due to a shortage of foreign exchange). See also documentary credit.