diff --git a/addons/account_voucher/account_voucher_pay_invoice.xml b/addons/account_voucher/account_voucher_pay_invoice.xml
index f289ab5ae41..49fbc444a91 100644
--- a/addons/account_voucher/account_voucher_pay_invoice.xml
+++ b/addons/account_voucher/account_voucher_pay_invoice.xml
@@ -9,7 +9,8 @@
            <field name="arch" type="xml">
            <xpath expr="//button[@name='invoice_open']" position="after">
                <div>
-               <button name="invoice_pay_customer" type="object" string="Register Payment" states="open" class="oe_form_button_hi"/>
+               <button name="invoice_pay_customer" type="object" string="Register Payment" attrs="{'invisible':['|',('sent','=',True), ('state', '!=', 'open')]}"/>
+               <button name="invoice_pay_customer" type="object" string="Register Payment" attrs="{'invisible':['|',('sent','=',False), ('state', '!=', 'open')]}" class="oe_form_button_hi"/>
                </div>
            </xpath>
            </field>