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Validation notification of IPN response is always INVALID. Does anyone know about this issue?

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Hemant347
Contributor
Posted on

I am trying using IPN simulator and my post back script always get INVALID response for the validation command post request. I also tried using PHP code in sandbox environment and it doesn't return anything and in production it always getting  "INVALID URL" response.

1 REPLY 1

Validation notification of IPN response is always INVALID. Does anyone know about this issue?

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MTS_Justin
Moderator
Hello,

Sounds like an issue with your script or how the data is being passed back for validation. The exact data which was received, must be sent back in the exact same order in which is was received and the character encoding must also match the original transmission.

Start by using an approved IPN script and test from there : https://github.com/paypal/ipn-code-samples

Was my post helpful? If so, please give me a kudos!

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