What is the official business definition of 3-Way Matching? 3-Way Matching is a business process used to ensure accuracy and integrity of financial transactions. It is a process of comparing information from three different sources to ensure that all information matches up. The three sources of information are the purchase order, the goods receipt, and the invoice. To ensure accuracy, all three documents must match in terms of quantity, quality, and cost. This ensures that the supplier has received the items that were ordered, that the buyer has received the items, and that the price for the items is correct. 3-Way Matching is important since it is a method of verifying that the buyer and the supplier are both on the same page in terms of the transaction. It also ensures that the financial transaction is accurate and that any discrepancies can be caught quickly. 3-Way Matching is a key part of the accounts payable process and helps maintain the accuracy and integrity of financial transactions.