We're new to SDP and started backfilling older invoices into the purchasing module to create and reconcile our assets for tracking. I've been leaving the SDP generated sequential PO # and then using the PO Name field to enter vendors' invoice numbers or, in the case of Apple, receipt numbers (R29646... etc).

I was curious what others were doing i.e.; are you using the PO Name field as a descriptive field describing the order, etc.