How can you accept credit cards on line from other countries?

If I have an ecommerce website, and someone from Europe wants to use a credit card to pay for the product, will that be any different from accepting credit cards from people in the United States? I plan on using Visa, Mastercard, AE, and possibly Discover card as payment options. I am using authorize.net as my gateway. Thanks for the help!

It's no different from accepting US based credit cards. The most important thing to know is that foreign credit cards do not support AVS or CVV and this means you have no means to verify if the credit card is legitimate or or not. This increases your likelihood of fraud especially considering the international orders are high risk anyway.

Basically if you're going to accept international be careful as your risk goes up significantly. Also, be sure to notify your merchant account provider that you intend to accept international orders as they may not allow that. This will prevent them from freezing your account and holding your money.

Authorize.Net shouldn't matter but it turns out they do. They apparently have an issue with handling AVS from Canada and the UK. If you plan to accept orders from there you should make sure you don't have Authorize.Net set to decline orders that Fail AVS automatically.