Topic
card payments
Focused guides connected by this engineering topic.
ISO 8583 Explained: Complete Guide to Payment Message Structure and Transaction Processing
A system-level guide to ISO 8583 message anatomy, participants, transaction flows, reliability controls, security boundaries, testing, and reconciliation.
Card Payment Transaction Flow: From POS Terminal to Issuer and Back
Follow a card payment from cardholder and terminal through merchant, acquirer, switch, network, issuer, clearing, and settlement.
Issuer vs Acquirer: Roles in Card Payment Processing
Compare issuers and acquirers across customers, risk, authorization, merchant acceptance, settlement, disputes, and system responsibilities.