: Essential "switchboards" like Visa , Mastercard , American Express , and Discover .

This report outlines the essential components of "merchant credit card" systems, focusing on how businesses accept card payments and the associated financial and regulatory landscape as of April 2026. 💳 The Ecosystem: Core Entities

Payment processing happens in several distinct stages, often in a matter of seconds for authorization, with settlement following later.

: The bank that provides the credit card to the customer. 📈 The Transaction Process