The objective of this user manual is to describe how to merge duplicate suppliers into a single, consolidated supplier and to merge transactions within the same supplier from one supplier site to a different supplier site. You can choose to merge all transactions for a supplier into a new supplier, or you can just choose to merge unpaid invoices. For purchase orders, you can indicate whether you want all or none of the existing purchase orders to be updated with the new supplier/site names.
Oracle financials r12: user manual for supplier merge 2012-03-01
Oracle financials r12: user manual for supplier merge