The legal consequences of contractual trustee's fault

In the Iranian law, certainly, the trustee has not any responsibility in respect of any defect and depreciation which supervenes on the property which is the subject of the contract. However, if he committes a fault, it is not effective on the validityof the contract. So too, his responsibility in regard to the property is not absolute strict or limited strict, but it is based on the conditions and rules of contractual responsibility. In addition, If he committes Fault through taking benefit of the property, his responsibility is based on the principles of taking advantage and not the principles of the usurpation and his fault has no effect on the contractual obligations of the owner nor the rights of trustee.