Hola K, y bienvenido/a al foro,
If you mean Bill of Exchange, perhaps this definition will be a helpful confirmation:
A non-interest-bearing written order used primarily in international trade that binds one party to pay a fixed sum of money to another party at a predetermined future date.
Otra posibilidad es Letter of Credit. This may also have time specific conditions attached to it regarding payment to the original vendor or to a third party.
Saludos,
Cuchufléte