Enter the article number (SKU) your ERP uses for shipping, so it can be matched to the shipping row in Qliro when crediting.
For example, enter FRAKT if refunds from your ERP use FRAKT for shipping, while Qliro uses a shipping row like shipping_29.
Good to know
You can leave it empty if Always Credit Shipping Fee is set to Yes.
You can also leave it empty if your ERP uses the same SKU for shipping as Qliro.