Three documents represent three events
A purchase order records what the business requested from a supplier. A goods receipt note, often called a GRN, records what physically arrived. A supplier invoice records what the supplier wants to charge. Those quantities and dates can differ without any document being automatically wrong. Treating the three records as interchangeable makes shortages, early billing and excess deliveries harder to spot.
Compare quantities before approving the bill
Suppose a purchase order covers 200 pieces, the warehouse receives 180 and the supplier invoices 200. The receiving team should record the actual accepted quantity, including damaged or rejected pieces where relevant. Procurement can then follow up the shortage, while accounts reviews what should be paid under the commercial agreement. Do not alter the GRN merely to match the invoice total.
Check price, tax and extra charges
After quantity matching, review item rates, discounts, freight and the correct tax configuration. Confirm the supplier identity and invoice number to reduce duplicate entry. If partial receipts are common, agree on how much can be invoiced and when. Payment approval should have a clear owner, supporting references and a way to explain any outstanding difference later.
Keep an exception trail
Document why stock or charges differ from the purchase order. Return or debit-note workflows may be appropriate in some cases, depending on company policy. Run periodic reports comparing received-not-invoiced and invoiced-not-received activity where supported. XlinkONE provides procurement, receipt, inventory and accounting workflows; connecting them correctly depends on posting discipline and consistent master records. Review open purchase orders at the end of each month to understand delayed supplier deliveries and their cash flow impact.