diff --git a/addons/sale/controllers/portal.py b/addons/sale/controllers/portal.py
index af548cfe57e..baf3078d87a 100644
--- a/addons/sale/controllers/portal.py
+++ b/addons/sale/controllers/portal.py
@@ -1,11 +1,13 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
+import base64
+
 from odoo import http, _
 from odoo.exceptions import AccessError
 from odoo.http import request
 from odoo.tools import consteq
-
+from odoo.addons.portal.controllers.mail import _message_post_helper
 from odoo.addons.portal.controllers.portal import CustomerPortal, pager as portal_pager, get_records_pager
 
 
@@ -54,6 +56,8 @@ class CustomerPortal(CustomerPortal):
         }
         if access_token:
             values['no_breadcrumbs'] = True
+            values['access_token'] = access_token
+        values['portal_confirmation'] = request.env['ir.config_parameter'].sudo().get_param('sale.sale_portal_confirmation_options', default='none')
 
         if kwargs.get('error'):
             values['error'] = kwargs['error']
@@ -64,6 +68,7 @@ class CustomerPortal(CustomerPortal):
 
         history = request.session.get('my_orders_history', [])
         values.update(get_records_pager(history, order))
+
         return values
 
     @http.route(['/my/quotes', '/my/quotes/page/<int:page>'], type='http', auth="user", website=True)
@@ -192,3 +197,32 @@ class CustomerPortal(CustomerPortal):
             ('Content-Length', len(pdf)),
         ]
         return request.make_response(pdf, headers=pdfhttpheaders)
+
+    @http.route(['/my/quotes/accept'], type='json', auth="public", website=True)
+    def portal_quote_accept(self, res_id, access_token=None, partner_name=None, signature=None):
+        if request.env['ir.config_parameter'].sudo().get_param(
+                'sale.sale_portal_confirmation_options', default='none') not in ('pay', 'sign'):
+            return False
+        try:
+            order_sudo = self._order_check_access(res_id, access_token=access_token)
+        except AccessError:
+            return {
+                'error': _('Invalid order')
+            }
+
+        if order_sudo.state != 'sent':
+            return {
+                'error': _('Order is not in a state requiring customer validation.')
+            }
+        order_sudo.action_confirm()
+
+        _message_post_helper(
+            res_model='sale.order',
+            res_id=order_sudo.id,
+            message=_('Order signed by %s') % (partner_name,),
+            attachments=[('signature.png', base64.b64decode(signature))] if signature else [],
+            **({'token': access_token, 'token_field': 'access_token'} if access_token else {}))
+        return {
+            'success': _('Your Order has been confirmed.'),
+            'redirect_url': '/my/orders/%s?%s' % (order_sudo.id, access_token and 'access_token=%s' % order_sudo.access_token or ''),
+        }
diff --git a/addons/sale/views/assets.xml b/addons/sale/views/assets.xml
index ac906fd317f..9f89db5ab72 100644
--- a/addons/sale/views/assets.xml
+++ b/addons/sale/views/assets.xml
@@ -7,8 +7,8 @@
     </template>
 
     <template id="assets_frontend" inherit_id="web.assets_frontend" name="Sale frontend assets">
-      <xpath expr="." position="inside">
-          <link rel='stylesheet' href='/sale/static/src/less/sale_portal.less'/>
-      </xpath>
+        <xpath expr="." position="inside">
+            <link rel='stylesheet' href='/sale/static/src/less/sale_portal.less'/>
+        </xpath>
     </template>
 </odoo>
diff --git a/addons/sale/views/sale_portal_templates.xml b/addons/sale/views/sale_portal_templates.xml
index e0165be86b2..bed706cd64d 100644
--- a/addons/sale/views/sale_portal_templates.xml
+++ b/addons/sale/views/sale_portal_templates.xml
@@ -131,6 +131,8 @@
     <template id="portal_order_page" name="Sales Order">
       <t t-call="portal.portal_layout">
         <t t-set="sales_order" t-value="order"/> <!-- rename to ensure breadcrumb compatibility (differentiate with purchase orders) -->
+        <t t-set="invoices" t-value="[i for i in order.invoice_ids if i.state not in ['draft', 'cancel']]"/>
+        <t t-set="invoices_amount" t-value="sum(i.amount_total for i in invoices)"/>
         <div id="optional_placeholder"></div>
         <div class="container">
           <div class="panel panel-default">
@@ -145,7 +147,17 @@
                     </h4>
                 </div>
                 <div class="col-md-6 col-sm-6 col-xs-12 hidden-print" id="o_portal_order_actions">
-                    <a target="_blank" t-att-href="'/my/orders/pdf/%s?%s' % (order.id, keep_query())" class="pull-right" title="Download">
+                    <t t-if="order.state == 'sent' and portal_confirmation == 'sign'" name="portal_confirmation_sign">
+                        <a class="btn btn-primary ml8 pull-right" href="#portal_sign">
+                            <i class="fa fa-arrow-circle-right"/> Accept &amp; Sign
+                        </a>
+                    </t>
+                    <t t-if="order.state == 'sale' and portal_confirmation == 'sign'">
+                        <a class="btn btn-success ml8 pull-right" disabled="disabled">
+                            <i class="fa fa-check-circle"/> Signed
+                        </a>
+                    </t>
+                    <a target="_blank" t-att-href="'/my/orders/pdf/%s?%s' % (order.id, keep_query())" class="ml8 pull-right" title="Download">
                         <i class="fa fa-download fa-2x" aria-hidden="true"/>
                     </a>
                 </div>
@@ -165,7 +177,6 @@
                   <div>
                     <address t-field="order.partner_invoice_id" t-options='{"widget": "contact", "fields": ["address", "name"], "no_marker": True}'/>
                   </div>
-                  <t t-set="invoices" t-value="[i for i in order.invoice_ids if i.state not in ['draft', 'cancel']]"/>
                   <t t-if="invoices">
                     <div>
                       <strong>Invoices</strong>
@@ -277,6 +288,19 @@
                 </div>
               </div>
             </div>
+            <div class="panel-body">
+                <div class="row" t-if="order.state == 'sent' and portal_confirmation == 'sign'" id="portal_sign">
+                    <div class="col-md-offset-3 col-md-6">
+                        <h4>Accept order</h4>
+                        <t t-call="portal.portal_signature">
+                            <t t-set="object" t-value="order"/>
+                            <t t-set="partner_name" t-value="order.partner_id.name"/>
+                            <t t-set="callUrl" t-value="'/my/quotes/accept'"/>
+                            <t t-set="accessToken" t-value="order.access_token"/>
+                        </t>
+                    </div>
+                </div>
+            </div>
           </div>
         </div>
         <div class="oe_structure mb32"/>