Online payments in the Czech Rep. can be paid using GoPay service. Documentation can be found at: https://help.gopay.com/cs/tema/integrace-platebni-brany/technicky-popis-integrace-platebni-brany/postup-integrace-platebni-brany We plan to use it in external systems like VuFind.
You may be interested in Bug 19173.
~4 years later and online payment plugins are now pretty well established. Can this bug be closed?
(In reply to Magnus Enger from comment #2) > ~4 years later and online payment plugins are now pretty well established. > Can this bug be closed? Indeed! Considering we are even moving PayPal to be plugin-only, I think it's definitely safe to close this report. Even with activity, we would close it with a request to develop it as a plugin.