Pay-Pal identity token for setting up Payment Data Transfer

[insertcoin]

Where exactly needs to be placed the indentity token Pay-Pal provides for setting up Payment Data Transfer ?!

Is it the "notify.php" file ? or somewhere else ?!
Many thanks!

[ajredding]

To my knowledge the PDT feature of paypal is not implemented at all in virtuemart.  Unless somebody else has different knowledge on this the only way to receive transaction notifications is through IPN