diff --git a/addons/sale/models/sale.py b/addons/sale/models/sale.py
index a32f251238c..38ef7123c62 100644
--- a/addons/sale/models/sale.py
+++ b/addons/sale/models/sale.py
@@ -112,6 +112,11 @@ class SaleOrder(models.Model):
         for order in self:
             order.order_line._compute_tax_id()
 
+    @api.multi
+    def _get_payment_type(self):
+        self.ensure_one()
+        return 'form'
+
     name = fields.Char(string='Order Reference', required=True, copy=False, readonly=True, states={'draft': [('readonly', False)]}, index=True, default=lambda self: _('New'))
     origin = fields.Char(string='Source Document', help="Reference of the document that generated this sales order request.")
     client_order_ref = fields.Char(string='Customer Reference', copy=False)