diff --git a/addons/account/views/account_invoice_view.xml b/addons/account/views/account_invoice_view.xml
index 27b705532fe..9e329ca3922 100644
--- a/addons/account/views/account_invoice_view.xml
+++ b/addons/account/views/account_invoice_view.xml
@@ -348,10 +348,10 @@
             <field name="arch" type="xml">
                 <form string="Invoice">
                 <header>
-                    <button name="action_invoice_sent" type="object" string="Send by Email" attrs="{'invisible':['|',('sent','=',True), ('state', '!=', 'open')]}" class="oe_highlight" groups="base.group_user"/>
-                    <button name="invoice_print" string="Print Invoice" type="object" attrs="{'invisible':['|',('sent','=',True), ('state', '!=', 'open')]}" class="oe_highlight" groups="base.group_user"/>
-                    <button name="action_invoice_sent" type="object" string="Send by Email" attrs="{'invisible':['|',('sent','=',False), ('state', '!=', 'open')]}" groups="base.group_user"/>
-                    <button name="invoice_print" string="Print Invoice" type="object" attrs="{'invisible':['|',('sent','=',False), ('state', '!=', 'open')]}" groups="base.group_user"/>
+                    <button name="action_invoice_sent" type="object" string="Send by Email" attrs="{'invisible':['|',('sent','=',True), ('state', 'not in', ('open','paid'))]}" class="oe_highlight" groups="base.group_user"/>
+                    <button name="invoice_print" string="Print Invoice" type="object" attrs="{'invisible':['|',('sent','=',True), ('state', 'not in', ('open','paid'))]}" class="oe_highlight" groups="base.group_user"/>
+                    <button name="action_invoice_sent" type="object" string="Send by Email" attrs="{'invisible':['|',('sent','=',False), ('state', 'not in', ('open','paid'))]}" groups="base.group_user"/>
+                    <button name="invoice_print" string="Print Invoice" type="object" attrs="{'invisible':['|',('sent','=',False), ('state', 'not in', ('open','paid'))]}" groups="base.group_user"/>
                     <button name="%(action_account_invoice_payment)d" id="account_invoice_payment_btn" type="action" states="open" string="Register Payment" groups="account.group_account_invoice" class="oe_highlight"/>
                     <button name="action_invoice_open" type="object" states="draft" string="Validate" class="oe_highlight" groups="account.group_account_invoice"/>
                     <button name="%(action_account_invoice_refund)d" type='action' string='Add Credit Note' groups="account.group_account_invoice" attrs="{'invisible': ['|',('type', '=', 'out_refund'), ('state', 'not in', ('open','paid'))]}"/>