I have received notice that I am not compliant with the new Merchant Security Upgrade requirements. However, I am a bit confused on wht I actually need to do. All the documentation I am reading is mostly about APIs. I am simply using a "buy now" button - the actions is using HTTPS. I do use the IPN, but all my postbacks are using HTTPS. I have been testing with the sandbox successfully (https://www.sandbox.paypal.com/cgi-bin/webscr) - and the docs I read said that the sandbox is using the new security upgrade. I am assuming that my sandbox testing is working that I am compliant, but I got notifications that I am not. What am I missing?
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