• If your business is in Indiana and you get a large phone order from someone in California that you don't know, it is most likely fraud.

• Swipe magnetic stripe cards, insert EMV cards, get signatures and authorizations.

• Respond quickly to requests for transaction copies (Retrieval Requests)

• Issue credit / refunds quickly.

• Avoid duplicate transactions

• Cancel recurring transactions when asked.

• Get signed proof of delivery when shipping goods to your customer's billing address.

• Don't continue with an authorization after the card has been declined.

• Resolve disputes with the customer early. Make sure the customer has a clear understanding of your return policy.

• Make sure the embossed numbers on the card match the printed receipt.

Visit Mastercard for more information.