John Waldron is co-owner of e-onlinedata, inc., a credit-card merchant-account provider. e-onlinedata assists thousands of ecommerce merchants with domestic and overseas credit-card transactions, and he offers the following advice for merchants who wish accept credit-card payments from international customers.

1. Ask customer for fax verification. For suspect orders or large orders, ask the customer to fax the front and back of his credit card as well as a form of identification. This is better than a phone call.
2. Call your credit-card processor. Your credit-card processor has a staff to assist you with questionable orders. Rely on their expertise.
3. Analyze the order, and be skeptical. Why would a customer purchase, for example, 10 routers? Likewise, why would an overseas customer request overnight shipping?
4. Overseas banks are different. Many overseas banks don’t support the card-code verification system, and they can’t verify billing addresses. Be aware, therefore, that these fraud-prevention steps may not help you with cards that have been issued from such banks.
5. Do a BIN look-up. The first six digits of a credit card are called the bank identification number, or BIN. They tell you which bank has issued the credit card. Go to http://all-nettools.com/toolbox,financial, and enter these six digits. If the issuing bank is located in a country that is different from where the order is originating, you should investigate further.
6. Purchase fraud-detection tools. Many credit-card banks and payment gateways offer effective fraud detection tools that are incredibly inexpensive. Use these tools.

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