<?xml version="1.0"?>
<xpath expr="//field[@name='paperformat_id']" position="after">
                    <field name="from_invoice" invisible="1"/>
                    <field name="vat"/>
                    <field name="account_number" string="Bank Account Number" required="qr_code" placeholder="BE71096123456769"/>
                    <field name="qr_code" string="QR Code" invisible="not from_invoice"/>
                </xpath>
            