2012

IPN Guide July 10, 2012 41
7
IPN Variable Reference
PayPal returns related variables for each kind of IPN message. Not all variables are returned
for each type of transaction.
 IPN Transaction Types
 Transaction and Notification-Related Variables
 Buyer Information Variables
 Payment Information Variables
 Auction Variables
 Mass Pay Variables
 Recurring Payments Variables
 Subscription Variables
 Pay Message Variables
 Preapproval Message Variables
 Adaptive Accounts IPN Messages
 Dispute Resolution Variables
IPN Transaction Types
Typically, your back-end or administrative processes will perform specific actions based on
the kind of IPN message received. You can use the txn_type variable in the message to
trigger the kind of processing you want to perform.
Transaction Type
(txn_type) Description
— Credit card chargeback if the case_type variable contains chargeback
adjustment A dispute has been resolved and closed
cart Payment received for multiple items; source is Express Checkout or the PayPal
Shopping Cart.
express_checkout Payment received for a single item; source is Express Checkout
masspay Payment sent using MassPay
mp_signup Created a billing agreement
merch_pmt Monthly subscription paid for PayPal Payments Pro