Credit Card Processing Fundamentals

For folks who want to learn the fundamentals of credit card processing, the following links would be useful. The intuitive illustrations make it very easy to understand the overall flow.

http://blog.unibulmerchantservices.com/transaction-authorization-process/

http://blog.unibulmerchantservices.com/submission-clearing-and-settlement-of-credit-card-transactions/

http://blog.unibulmerchantservices.com/mastercard-chargeback-stages/