A sheet handling system configured to determine a denomination and authenticity of a banknote deposited therein and discharge therefrom the banknote which is determined as a counterfeit note, and determine whether an authentication determination of a coupon deposited therein is to be performed or not based on a type of the coupon, the sheet handling system comprising: an inlet in which sheets including a banknote and a coupon are deposited; a plurality of sheet cassettes each configured to store the banknote and the coupon which are deposited in the inlet; a determination target setting unit configured to update determination setting data based on a received operation to set a target of authentication determination; a type determination unit configured to determine the type of the coupon, to determine the necessity of the authentication determination by referring to the determination setting data based on the determination result of the type of the coupon and to determine that the coupon is a first-type coupon if authentication determination is necessary and that the coupon is a second-type coupon if authentication determination is not necessary; an authentication determination unit configured to perform the authentication determination for the coupon if it has been determined by the type determination unit that authentication determination is necessary, and wherein the sheet handling system is configured to discharge the coupon if the coupon is determined to be a counterfeit coupon as result of the authentication determination, to store the coupon in one of the sheet cassettes (53, 54) if the coupon is determined to be a genuine coupon and to store the coupon in one of the sheet cassettes (53, 54) without performing the authentication determination by the authentication determination unit if it was determined that authentication determination for the determined type of the coupon is not necessary. an inlet in which sheets including a banknote and a coupon are deposited; a plurality of sheet cassettes each configured to store the banknote and the coupon which are deposited in the inlet; a determination target setting unit configured to update determination setting data based on a received operation to set a target of authentication determination; a type determination unit configured to determine the type of the coupon, to determine the necessity of the authentication determination by referring to the determination setting data based on the determination result of the type of the coupon and to determine that the coupon is a first-type coupon if authentication determination is necessary and that the coupon is a second-type coupon if authentication determination is not necessary; an authentication determination unit configured to perform the authentication determination for the coupon if it has been determined by the type determination unit that authentication determination is necessary, and wherein the sheet handling system is configured to discharge the coupon if the coupon is determined to be a counterfeit coupon as result of the authentication determination, to store the coupon in one of the sheet cassettes (53, 54) if the coupon is determined to be a genuine coupon and to store the coupon in one of the sheet cassettes (53, 54) without performing the authentication determination by the authentication determination unit if it was determined that authentication determination for the determined type of the coupon is not necessary.