IPN notification url won't update
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A few days ago I changed my notification URL under "account settings / website payments/Instant payments notifications/update" I changed the notification URL (which has been working correctly since 2002) to a new one.
However, PayPal is still using the old one. For some reason the setting has NOT taken effect. I have checked and everything is correct under my settings: the new URL is there and "message delivery" is enabled.
When I check the IPN history is shows the notification was sent to the old URL.
Why are IPN notifications still being sent to the old one despite updating the URL? Note these are NOT for recurring payments (which we don't use).
What do we have to do to get PayPal to use the new URL?

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Good day @peterhoa ,
Thank you for contacting PayPal community.
This should be an issue with the "notify_url" parameter which is passing the old IPN URL in your website payment request API call to PayPal system.
Though you have updated the NEW_IPN_URL in your PayPal account settings, the OLD_IPN_URL might have been passed from your website as "notify_url".
The OLD_IPN_URL passed in "notify_url" will over ridding the NEW_IPN_URL marked in your PayPal account settings.
I request to please contact your website developer or the support of the third party platform eCommerce to cross check your website payment API request call and make sure your passing New_IPN_URL as "notify_url".
Once this is done, PayPal system will send the IPN response to your New_IPN_URL.
(Or)
You can avoid/stop pass the "notify_url" parameter in website payment API request call, since you have already updated the New_IPN_URL in your PayPal account settings.
Please refer the guide link : https://developer.paypal.com/api/nvp-soap/ipn/IPNSetup/#link-dynamicallysettingthenotificationurl
Thank you so much for your patience and understanding.
Sincerely,
Chiranjeevi
PayPal/Braintree MTS
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Same problem here. I do NOT use "notify_url", and the new IPN address entered 4 weeks ago has not propagated, so it is still calling the old address.
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I am having same issue
If you need to check the information I can provide the Transaction Reference and Message ID so you can investigate. The updated url is appearing on paypal but when payment is made the IPN notification fails and keep retrying on old url. I have looked at the url generated for paypal and it does not contain any such value in return_url that can tell paypal about the old url.
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Same happens to me. I updated the notification URL a month ago, and I see the new URL on the IPN settings page. The notifications are still sent to the old URL. I'm not using return_url

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