SDCL § 22-30A-40: Liability for cost of motor fuel received--Service charge.

The owner of a motor vehicle who has not paid for the motor fuel received is liable to the motor fuel retailer for the cost of the motor fuel. If notice of a service charge is conspicuously displayed on the premises when the motor fuel was received, the motor fuel retailer may impose a service charge not to exceed thirty dollars for any collection cost.