Linking Purchase/Sales Invoice with Customer Return Invoice?

[Wan Agus <br...@akewan.com>]

Hi everyone,

Here's a question that seems basic but I can't seem to find the answer 
in the documentations.  I have users who wants to link Purchase/Sales 
invoice with Customer Return invoices, basically counting the CR 
invoices as a sort of payment.  I saw the code that calculate the total 
amount, applied amount (and hence unapplied amount) of an invoice and 
they only take PaymentApplication into account and nothing else.  Here's 
a use case that we're running into:

A Purchase Invoice has been posted.  Before we pay it, we realize the 
vendor is overcharging us, so ideally, we want to create a CR invoice, 
attach it to the Purchase Invoice and when we pay the reminder (through 
Payment and PaymentApplication), the invoice can be moved to Paid 
state.  Is this something that opentaps/ofbiz supports?   Also, since 
I'm a neophyte in both opentaps and accounting in general, is this 
usually a generally accepted practice?

thanks,
wan