( b ) supplementary measures to verify or certify the documents supplied , or requiring confirmatory certification by an institution covered by this Directive ; ( c ) that the first payment of the operations is carried out through an account opened in the customer 's name with a credit institution .
b ) medidas complementarias a fin de comprobar o certificar los documentos facilitados o exigencia de una certificación de confirmación expedida por una entidad o institución sujeta a lo dispuesto en la presente Directiva ;