How to create invoice auto matching?

Current Process:

1. User create PO and perform receiving.

2. AP user create invoice manually, by enter supplier info, invoice number, amount and match to receipts one-by-one.

We wish to automate the invoice matching process so in future invoice can be created to auto matched to those receipts based on input of invoice number and amount, while the rest of information like supplier, supplier site, receipt, quantity can be retrieved from PO and Receipt.

Then Finance just proceed invoice validation and etc.

Kindly guide us if there's possible in Oracle R12.

If need customization, what's the interface tables involved in order to trigger the auto invoice matching program.