Processing credit cards at your organization comes with many responsibilities.
The links provided here will give you with the information you need to operate safely and securely as an organization accepting credit card payments.
Below are links to MasterCard resources for merchants:
MasterCard Online Education Resources
"The Merchant's Guide to Chargebacks" video presentation
MasterCard Security training
MasterCard PCI 360 information:
Glossary of common payment terms
In addition, MasterCard offers a new eLearning Platform that provides information regarding MasterCard's Rules, Compliance Programs and Dispute Resolution.
Processes on MasterCard’s public website - www.mastercard.com/elearning