We routinely issue credits for a percentage of unit price to customers who bought product but were not satisfied. The product is not returned we are simply refunding them x% of purchase price. We are evaluating the RMA  module and want to use it for all RA transactions which will include:

1. Return items for credit

2. Return and Replace items which may involve a partial credit

3. Credit only where the customer is keeping the product and we are crediting them for part of the purchase price

4. Credit partial or all of freight charges

Not seeing in the RMA module to credit a customer's invoice  without a material return whether scrap or to stock.