Contingent Worker - Can the PO be entered without specifying Contractor Name?

Hi,

I have the requirement of a client that wants to use Contingent Worker Functionality but doesn't want to define the Contractor before the PO is created (because they don't know the contractor name at the PO entry stage). They don't want to specify the Contractor Name at PO level neither.

What they would like is to enter the PO without the Contractor name but choosing the Vendor name and at the moment that they know the contractor name create the contractor in HR and select the PO in the Contingent Worker definition in HR.

Is that possible to achieve?