Standard installation 3.6. During checkout process step5 (payment information) there is an empty input field for PO Number? What is this for? Customer choose standard bank transfer (pre payment), so there is not any number/value to ask for. How can step 5 be disabled? It's totally confusing for customers.
It sounds like you're using the Purchase Order payment method as that's part of its standard functionality. The Friendly Name of the plugin might have been changed to something different on your store.
Have a look in the admin area under: Configuration > Payment > Payment Methods where you can see the System Name for the payment method plugin to confirm whether this is the case.
Thank you for your reply. Yes, I' using Purchase Order payment method. Is there a better standard method/plugin for standard bank transfer? Because I couldn't find any other suitable method for this type of payment. So I need a new plugin for standard bank transfer?
The Check / Money Order plugin is basically the same as the purchase order method but doesn't have any fields for user input. You could use that and change the friendly name to Bank Transfer.
The PO Number is often used by business customers - independent from the payment method selected.
Can this feature not be added during the normal checkout process ?
Purchase order number provided you directly to the customer in a manual agreement. You can use Cash On Delivery plugin to meet your purpose.