The merchant application is the link between both the merchant and the buyer, in order to provide the ability to verify the voucher and redeem its customers from it through the merchant application, which means preserving the rights of both parties and making sure that the voucher is not used by the buyer at merchant in this case the voucher cannot be used twice either. If the buyer does not Redeem the voucher previously and meets the conditions the buyer has the right to Redeem the voucher. The buyer must only visit the merchant at the specified time and show the Voucher, and the merchant make Redeemed to the voucher he has through the application, if the buyer Redeemed the voucher at merchant, the relationship between the two parties with Voucherek has ended