aff7432 affiliate affiliates automatically cases commission confused custom designation iaff internally invoices items notation pay paypal paypal-specific properly refund request sales sell signed tracking

On my PayPal invoices, I see this notation:

Custom: [%aff7432|iaff%]
and I'm a little confused....is this a designation for an affiliate that signed up to sell my items via e-junkie, or some PayPal-specific notation?

I have a refund request and need to know, to properly pay the affiliates in such cases.

This is something that we use internally for tracking affiliate sales. E-junkie automatically takes out the affiliate commission in case of a refund.