Using PDT from an IPN listener

[Pbdb]

Hi,

when i post an HTTP request from my ipn listner for example  "/cgi-bin/webscr?cmd=_notify-synch&tx=" & $txID & "&at=" & $IdentityToken 
i will need to check and verify whether a payment status was changed from pending to completed if the first status I got was "Pending"
now i noticed the PDT information does come through but wont last for long, (just for instance what if i'm checking the payment's status after 2 months ..)
what other form of request can i use @Using my identetytoken and what would be the correct syntax for it just the basic one (as the above example) for posting from my ipn listener script that will last for long term 

Thanks

Pbdb

[Pbdb]

Am I posting the question to the right forum ?

[PayPal_Olivia]

Hi @Pbdb,

Thank you for your post! I've moved your post to our Merchant Integration Technical Support forum, to give it the opportunity to be answered by people with the knowledge to assist.

I hope this helps!

Olivia