https://praguepig.com/2019/09/contactless-card-payments-of-up-to-500-kc-could-be-rejected-at-some-czech-terminals-from-saturday-14-september-as-new-eu-driven-two-factor-authentication-law-comes-into-effect-czech-national-ba/
Contactless card payments of up to 500 Kc could be rejected at some Czech terminals from Saturday (14 September) as new EU-driven "two-factor authentication" law comes into effect; Czech National Bank warns that many businesses are unprepared for the change; contactless payments for public transport tickets may be affected (iDNES.cz) [Social Media Post] *edited*