With increasing development activities, financing institutions, as required. The financing institution is a business entity that performs the activity of financing in the form of the provision of funds or capital goods. in indonesia often appear institutions financing based on fiduciary guarantee. Statutory fiduciary guarantee Number 42 year 1999 Article 1, fiduciary transfer of ownership rights is an object on the basis of trust on the condition that the rights of ownership of objects that remain in the mastery of the transferred owner objects. Then arose the problem of how the formula due to the law of fiduciary guarantee execution bussan auto finance in practice? From the results of the analysis it was concluded that bussan auto finance in implementation do not show a certificate but they say that if consumers need them will be no ruling can show them. due to result in anything, but they do not have the force of law that remain in the execution.