E-commerce web system for producing vouchers (coupons) for different services and products of tenant companies. Tenants have the option to design a voucher to identify with and to implement their specific corporate style. Then a web page with a voucher can be integrated into a tenant’s website through an IFrame element. The web system is integrated with a lot of payment systems: PayUnity, Qenta, SaferPay, 3C Portal, ConCardis. The website is PCI compliant and Thawte certified.