Vendor Commission / Credits

aspernormal

We are a Canadian company that deals with a US manufacturer. We sell smaller sales to clients from our inventory, but larger sales we have clients purchase and import directly from the manufacturer. The manufacturer will credit the commissions from these sales against previous and future invoices. Wondering if anyone has any advice on the best practice on recording this in wave. Since commissions are never "paid" to us directly, can these commissions be treated as a refund as a quick and easy method or is there accounting rules on commissions and best practices for this? I hope that my question has enough information and I appreciate any and all answers. Thank you for your time.