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by robterrell 5206 days ago
Hey, maybe that was me! I sell software online via PayPal IPN, and at least once a day (often more) I get email from customers angry at me for not sending their license key. Invariably it's because they no longer use the email address that PayPal thinks they do.

I tried highlighting this in the FAQ and on the purchase page, but the rate at which it happens didn't seem to change.