Matching is PeopleSoft’s method for ensuring that an enterprise releases payments to its vendors only when a particular criteria is met. There are 4 types of matching in PeopleSoft – each one has a specific purpose.
2 Way Matching – Vouchers are matched against Purchase Orders (POs)
3 Way Matching – Vouchers are matched against POs and Receipts
4 Way Matching – Vouchers matched against POs, Receipts and Inspections
Receipt only Matching – Vouchers are matched against non-purchase order receipts
Here’s an article on matching.