How to register with PayPal and verify your credit card (09/26/2008)
... Most credit cards have three (or four) additional numbers listed on the back, immediately following the regular 16-digit number. Merchants use these numbers for security or verification but aren’t allowed to store them, so they’re presumably protected from hackers. However, in the unlikely event your credit card doesn’t have these numbers yet, PayPal still allows you to use your card by verifying it through a procedure known as random charge. PayPal charges a few cents or so to your card and asks you to disclose the pin number printed on your statement. Then PayPal knows that you control the card and didn’t steal it....

Selling internationally using PayPal as your payment system (09/26/2008)
... PayPal receives a wholesale rate (twice a day) and adds an additional 2.5 percent above this rate to determine their retail foreign exchange rate. PayPal PayPal is the largest of the online person-to-person payment services. Thankfully, eBay had the presence of mind to acquire this previously independent service in 2002, so it has now become the de facto standard for paying for items bought on eBay. PayPal allows buyers to safely click and pay with a credit card, instant transfer, or e-check directly from eBay after they’ve won an auction or made a purchase....

Secure server explain how and why payments are secured (09/25/2008)
... Security Policy Secure server explain how and why payments are secured • Credit card transactions explain the guarantee from the credit card company, and possibly extend it with your own, as Amazon does, to underwrite the first £50.00 as well • Encryption describe which level of encryption your site has, in simple terms: you are trying to impress and reassure the user, not give secrets away to potential hackers - Alternative methods of payment these can maximise revenue but add to the administrative burden. You will need to assess the costs and benefits of offering a range of payment methods - Refund policy make it clear how this operates. As with privacy, site visitors will have a natural concern with the security of your on-line payment system. It can seem risky to give credit card details to a stranger, especially one whose web site may be in a different country....