3-Way Matching 
                            You may make sure that you only pay the vendor bill for the goods that are delivered to
                                your address by using the Odoo 17 Purchase module's 3-Way Matching Purchase Receptions
                                and Bills feature. Before receiving the things purchased in the purchase order, vendors
                                may send you vendor bills. You might want to wait to make the payment until the things
                                are received, though. In these situations, you can utilize Odoo's 3-Way Matching
                                Purchase Receptions and Bills tool to determine whether or not the vendor bill needs to
                                be paid. This will compare the data on the vendor bill, receipt, and purchase order.
                                This function will prevent you from paying erroneous or fraudulent vendor bills.
                            The 3-Way Matching Purchase Receptions and Bills feature must first be enabled from the
                                Settings menu of the Purchase module.
                            
                                
                            
                            
                                As seen in the above image, you can find this feature under the Invoicing tab. Keep in
                                mind that the Received Quantities must be established for the bill control policy. From
                                the Settings menu or the product details window of the item you want to order, you may
                                change the control policy.
                            
                            You can establish a new purchase order with the items for which the control policy on
                                received quantities has been defined after activating the 3-way matching purchase
                                receptions and bills feature. If you should pay the bill or not will be indicated on the
                                vendor bill for this purchase order. On the vendor bill, Odoo17 will show one of the
                                three potential default values shown below.
                            
                                - Yes means that the things have been delivered and that the bill is due.
 
                                - No means that you shouldn't pay the bill because the goods you ordered haven't been
                                    delivered yet.
 
                                - The word "Exception" denotes a discrepancy between the quantities you purchased,
                                    were paid for, and were actually given.
 
                            
                             the vendor bill, Odoo17 will automatically set this value. Let's see how it functions in
                                Odoo 17.
                            By selecting the Receive Products button after completing the purchase order, you can get
                                the items you requested.
                            
                                
                            
                            For this purchase, you can verify the receipt and create a vendor bill.
                            
                                
                            
                            You can create a new vendor bill with the help of the Create Bill button. Odoo17 will
                                automatically indicate whether you need to pay the amount under the Other Information
                                tab of the vendor bill.
                            
                                
                            
                            
                                As you can see in the image above, it says Yes, indicating that since you received the
                                items you bought, you should pay this vendor's charge.
                            
                            
                                Let's now talk about the Dropshipping function offered by the Purchase module.