Yeah, sounds like it would be similar. I believe it has more so to do with what the agreement is on how the allowance should be disbursed. Here is how we handle it, curious to see what others are doing.
• If it's a percentage off each order we treat it as a discount on the sales order, since retailers will also want it to be sent on the Invoice.
• If it's special one time allowance or on a schedule then we do it via Credit Memo. If you are receiving something like an EDI 812 for this then it can be automated to auto create the Credit Memo.