Hopefully I'll be able to explain this properly - I believe this is 2 different settings worked into 1 checkbox.
Currently running OE v. 9.2A (160707)
In the Company Profile there is a magic checkbox labelled "credits on invoices". Here's where our problems arise:
1) If an order and invoice is posted and an RMA is applied, the system merges these 2 transactions into one. So, when my Receivables person accepts a payment from a customer and they're only paying the invoice portion without taking the credit (or vice versa) she cannot separate out the +/- to balance easily. We'd prefer that the "credits on invoices" box is checked off so that these transactions show as 2 different line items on account.
2) If that magic checkbox is off (see #1 for preference) the system no longer allows us to place line item #1 as +1 and line item #2 as a -1 (assuming the customer has purchased an item or service and we are providing a special discount to said invoice). Note that this is not for items which need to be returned to stock, therefore an RMA is not required. More for services that we allow a discount on...by using this as a negative item we can more easily track the number of times and amounts that the code was used in a year vs. just providing a general discount on the invoice.
Sounds like this should be two different options to me? Your advice is appreciated.