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Re:Can the Visa-Mastercard duopoly be broken? by lxgr on Thursday August 18, 2022 @08:45AM (#32508837)
The grandparent post was asking about the German payment system, which presumably refers to SEPA Direct Debit, not debit cards.

What you are referring to is called 3DS, and it's a feature of both credit and debit cards. (It's available worldwide, but most commonly used in the EU, since it's mandated for ecommerce card transactions in many circumstances.)

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