GRN Match to Invoice without PO

GRN Match to Invoice without PO

Many times no PO is created, but we still want to record the goods received note and match to an invoice. Currently no way to record the receipt of goods or services without a PO. The GRN should be an independent third document type, to match to a PO and/or invoice independently, instead of something which is 'applied to a PO' only.

I want to ensure we have received the goods/services billed to me on a given invoice, via a GRN. There are many times when a PO isn't raised for various reasons, this shouldn't stop a GRN being raised. 

This seems very obvious to me and I don't understand why the team at Zahara have built this in the current format.