PayPal IPN Failed "result: IPN Handshake Invalid"

This is often the result of PayPal's "item name" or another name having invalid characters or not supporting Unicode.

 

173.0.81.1 - - [17/Jul/2018:13:39:45 -0400] "POST //modules/gateways/callback/paypal.php HTTP/1.1" 406 - "-" "PayPal IPN ( https://www.paypal.com/ipn )"

A good clue is if you check the debug output of the IPN and find a mandatory column empty.

 

item_name =>

Obviously item_name has to be populated or things will usually break.  Login to your PayPal settings and update your character encoding settings:

See how to do this in PayPal below:

 

 

 

 

 

 

 


 

 

 

 


Tags:

paypal, ipn, handshake, invalid, quot, characters, supporting, unicode, jul, modules, gateways, callback, php, http, https, www, debug, output, mandatory, column, item_name, populated, login, settings, update, encoding,

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