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We are using PayPal payment last 4 years but recently payment issue occurs. Please help me ASAP. My customer payment failed due to IPN verification failed.
Using PHP lang integrated payment gateway and created price button for payment.
Let me know more information
$fp = fsockopen("tls://" .$url_parsed['host'],"443",$err_num,$err_str,30);
After 10 years of using IPNs, our verification is suddenly failing. We have not changed anything in our API.
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