https://www.bleepingcomputer.com/news/security/pos-malware-can-block-contactless-payments-to-steal-credit-cards/

New versions of the Prilex point-of-sale malware can block secure, NFC-enabled contactless credit card transactions, forcing consumers to insert credit cards that are then stolen by the malware.

On a payment terminal, contactless transactions use NFC (Near Field Communication) chips embedded in credit cards and mobile devices to conduct close-proximity payments via credit cards, smartphones, or even smartwatches.