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pbreit
on March 19, 2011
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Tell HN: PayPal is borked for most merchants
This is wrong. All you have to do is return a "200 OK" and PayPal will stop sending IPNs. You don't even need to perform the validation postback at all. It's completely optional.
chrisbolt
on March 19, 2011
[–]
But if you don't do the validation postback, anyone can fake an IPN message if they know your IPN URL.
pbreit
on March 20, 2011
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I'm just saying the validation is not required. There are different ways to ensure the IPN is valid.
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