21.1 Operating as a Merchant Card Unit
21.1.1 Determine the Best Technology for Accepting Credit/Debit Cards 21.1.2 Become a Merchant Unit 21.1.3 Accept Cards for Payment 21.1.4 Respond to Disputed Transactions 21.1.5 Refund a Transaction 21.1.6 Reconcile Credit/Debit Card Transactions
21.2 Security
21.2.1 Become PCI Compliant 21.2.2 Validate PCI Compliance Annually 21.2.3 Store Cardholder Data on Paper Securely
21.3 Stored Value or Gift Cards
21.3.1 Establishing Stored Value Cards or Gift Card Programs 21.3.2 Report Expired and Unredeemed Stored Value Cards, Gift Cards, and Other Cards
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