address authorize buyer buys canada cart charge check checking checkout checks customers direct ejunkie express flat google-checkout hit including integration international issue location net orders pay payment paypal paypal-pro potential price problem processed purchase rates sales shipping somebody sort standard suggestions swiftcd tax type validation

I have sort of hit a snag with the Ejunkie/SwiftCD integration. My issue is suppose I charge two different shipping rates, one for US and one for international. Then suppose somebody buys my CD from Canada but on the E-junkie cart they say they are from New York. Then when they go to PayPal to pay (or Google Checkout), they type in their real address. Now maybe I can avoid this problem by including shipping in the price for all potential customers (i.e., a flat price for everyone), but there is still the problem of sales tax. A person could type one location on the E-junkie cart to avoid sales tax and then type their real address when they finalize their purchase. Any suggestions?

With Google Checkout and PayPal Pro's Express Checkout, this is not an issue as the shipping is recalculated when buyer specifies a different address while checking out. It's not an issue in case of Authorize.Net and PayPal Pro's direct payment as well as we don't let buyer specify
a different address while checking out.

With PayPal Standard, we will soon add another check in our validation which checks for the address mismatch and such orders won't be processed.