Set a password on refund in pos session settings .

Open the session , you can see orders and refund button , you just click the refund button.

You can see a screen with orders , you just select which product you need to refund and set the quantity and click the "Refund" button .

You can see a number popup will display the screen.You can add the password in the popup same as we set pos session settings

You can see the refund process successfully done.

If you added the wrong password then an error message will show the screen

Using Global password

You can enable another feature by setting a global password in the Point of Sale (POS) configuration settings. Once the global password is set, clicking the refund button will trigger a pop-up where you can enter the global password. If the entered password is incorrect, an error message will be displayed.Furthermore, if a global password is configured in the POS settings, it becomes mandatory during the refund process. Attempting to use a refund password instead will result in an error message.