prepayment invoices referencing PO's which are not yet received

Summary

prepayment invoices referencing PO's which are not yet received

Content

Hi All,

We are working on a Cloud Implementation project where in the client has one requirement. They would want to create pre-payment invoices referencing PO's. The PO lines are all with invoice match option as "Order" and approval level as 3 way. So when the matching is performed in pre-payment invoice for a PO which is not yet received, the invoice goes into "needs re-validation". 

Our question is since the invoice created is a pre-payment invoice which is kind of advance payment to supplier, why should oracle say "needs revalidation".  Shouldn't it not look at the invoice type and ignore receiving for now? Please confirm.