diff --git a/addons/portal/views/portal_templates.xml b/addons/portal/views/portal_templates.xml
index 8e3e6dfed58..ecaee6ddbac 100644
--- a/addons/portal/views/portal_templates.xml
+++ b/addons/portal/views/portal_templates.xml
@@ -376,17 +376,20 @@
                             <div class="clearfix" />
                             <div t-attf-class="form-group mb-1 #{error.get('company_name') and 'o_has_error' or ''} col-xl-6">
                                 <label class="col-form-label label-optional" for="company_name">Company Name</label>
-                                <!-- The <input> is replace by a <p> to avoid sending an unauthorized value on form submit.
+                                <!-- The <input> use "disabled" attribute to avoid sending an unauthorized value on form submit.
                                      The user might not have rights to change company_name but should still be able to see it.
                                 -->
-                                <input type="text" name="company_name" t-attf-class="form-control #{error.get('company_name') and 'is-invalid' or ''}" t-att-value="company_name or partner.commercial_company_name" t-att-readonly="None if partner_can_edit_vat else '1'" />
+                                <input type="text" name="company_name" t-attf-class="form-control #{error.get('company_name') and 'is-invalid' or ''}" t-att-value="company_name or partner.commercial_company_name" t-att-disabled="None if partner_can_edit_vat else '1'" />
                                 <small t-if="not partner_can_edit_vat" class="form-text text-muted d-block d-xl-none">
                                     Changing company name is not allowed once document(s) have been issued for your account. Please contact us directly for this operation.
                                 </small>
                             </div>
                             <div t-attf-class="form-group mb-1 #{error.get('vat') and 'o_has_error' or ''} col-xl-6">
                                 <label class="col-form-label label-optional" for="vat">VAT Number</label>
-                                <input type="text" name="vat" t-attf-class="form-control #{error.get('vat') and 'is-invalid' or ''}" t-att-value="vat or partner.vat" t-att-readonly="None if partner_can_edit_vat else '1'" />
+                                <!-- The <input> use "disabled" attribute to avoid sending an unauthorized value on form submit.
+                                     The user might not have rights to change company_name but should still be able to see it.
+                                -->
+                                <input type="text" name="vat" t-attf-class="form-control #{error.get('vat') and 'is-invalid' or ''}" t-att-value="vat or partner.vat" t-att-disabled="None if partner_can_edit_vat else '1'" />
                                 <small t-if="not partner_can_edit_vat" class="form-text text-muted d-block d-xl-none">Changing VAT number is not allowed once document(s) have been issued for your account. Please contact us directly for this operation.</small>
                             </div>
                             <div t-if="not partner_can_edit_vat" class="col-12 d-none d-xl-block">