What is the primary function of a Card Issuer?

The primary function of a card issuer is to issue credit or debit cards to cardholders. This includes the responsibility of providing the necessary financial products and services that allow consumers to make purchases and manage their spending through these cards. Card issuers evaluate applications, extend credit lines, manage accounts, and provide customer service related to card use. Their role is crucial in the payment ecosystem, as they not only supply the physical cards but also help facilitate the transactions that occur when cardholders make purchases.

The other functions mentioned in the choices relate to different aspects of financial transactions and banking systems but do not specifically define the role of a card issuer. For instance, processing ACH entries is handled by payment processors and banks, while aggregating transactions in a blockchain is related to cryptocurrency and digital ledger technologies, which are outside the realm of card issuing. Similarly, acting as an intermediary between Originators and ODFI pertains to the ACH transaction process, which does not connect directly with the core responsibilities of a card issuer.