: to effect payments and in general carry out any act disposing of sums , thereby including the power to arrange for the payment of contribution , duties and taxes , signing the relative receipts and documentation required for charging to current bank of post office accounts belonging to the company , and in general carry out any act disposing of values, credit , commercial payment notes , or foreign currency ; to refund and withdraw deposits of sums , securities and guarantee deposits used as guarantees , down payments , or for administration , issuing , or receiving receipts