https://aporaclepayables.blogspot.com/2018/10/single-payment-of-vendor-with-multiple.html
Single payment of a vendor with multiple site is possible if you maintain following:
1) Payment type should be Manual
2) Invoices should be in single operation unit.
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Oracle Payables - Version 12.0.0 to 12.1.3 [Release 12.0 to 12.1]
This functionality is not available in the current product design.Enhancment request is already logged requesting this functionality.
