On Kronozio all sellers can choose to accept Paypal and/or any other payment method.
Online payments can be completed with the leader in online payment: Paypal.
If you want more details about how your transactions are protected with Paypal, you can read
this article

Other payment methods are at the discretion of the seller and most of the time will be used for customers that will pick up in store their cards.

Please note that for any type of payment other than Paypal, we strongly recommend you never to send money directly in an envelope to a seller that you don't know.