Standalone Credit Header

Standalone purchase credit notes currently have no header field so no location can be attributed to flow to our accounting system. The reference that flows through is also the system generated reference rather than being able to manually input a supplier reference as you would with an invoice so when trying to reconcile a supplier statement to our accounting system we have to guess which credits match up as they use their reference. The remitance advice they also get will show the Cin7 number rather than their own reference creating reconiciliation issues on their end as well. 

Can you please add a document header that has a location and supplier reference field to overcome this.