Have you tried getting the script to work the way they originally had it?
This may not be an issues but in your code you have. 

$return_query = "cmd=_notify-validate&" . $return_query;

[download]
But the way they had it. 
$query .= '&cmd=_notify-validate';

[download]
would be like this, if you wanted to wright it that way. Thats also guessing that string $return_query is formatted to support &Some=Thing;Like=That. 
$return_query = $return_query."&cmd=_notify-validate";

[download]

Update: $req->content_type('application/x-www-form-urlencoded; charset=UTF-8'); charset=UTF-8 may not work with PayPal.

In reply to Re: How do you use Paypal IPN with Dancer2? by $h4X4_|=73}{
in thread How do you use Paypal IPN with Dancer2? by MorayJ

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