Arturo Dergal Posted November 3, 2023 Share Posted November 3, 2023 Hello, for no apparent reason my IPNs haven't been working for 10 days, I have the error IPN HANDSHAKE INVALID, I've already looked into changing the charset, the firewall, the hosting, updated the WHMCS, contacted paypal, WHMCS, and sucuri, which takes care of protecting my site, but nothing has helped. If anyone has had this problem, I'd be delighted to hear from you. 0 Quote Link to comment Share on other sites More sharing options...
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