1. The cardholder makes an online purchase and initiates the payment (check-out).
2. The cardholder enters his/her card data and password in his/her bank's pop-up window.
3. The card-issuing bank authenticates the cardholder.
4. SIX Multipay authorizes the card payment.
5. The Payment Service Provider (PSP) delivers the payment.

For payment processing over the Internet, we recommend the exclusive use of a certified Payment Service Provider (PSP). This means that you do not have to prove compliance with the SDP/AIS security rules yourself. This saves you both time and money.