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I developed a solution to integrate my website with Paypal express checkout + IPN solution. (C# / [url removed, login to view])
BUT, everytime my costumer had an character in adress like áäã etc I got INVALID reply from PayPal.
I know its a encoding issue, but I review all the code and cant find a solution.
I want to someone solve this for me, I know its really simple to an expert in this API, so please bid according it.
ONLY experts in paypal.