diff --git a/sale.py b/sale.py
index 601e0f1..efde393 100644
--- a/sale.py
+++ b/sale.py
@@ -5,6 +5,7 @@ import calendar
 from decimal import Decimal
 from datetime import datetime, date, timedelta
 from itertools import chain
+from flask import Config
 
 from sql import Null, Table, With
 from sql.operators import NotIn, Or
@@ -55,6 +56,7 @@ class Sale(metaclass=PoolMeta):
     pre_sale = fields.Boolean('Pre-Sale', help="This option for pre-sale, change method of invoice to shipment")
     shipment_date = fields.Date('Shipment Date', states=STATES)
     turn = fields.Integer('Turn', states=STATES)
+    reservation= fields.Boolean('Reservation')
 
     @classmethod
     def __setup__(cls):
@@ -508,48 +510,69 @@ class Sale(metaclass=PoolMeta):
                     Invoice.validate_invoice([invoice])
                     return
             Invoice.process_invoice([invoice])
+            if invoice.state == 'posted' and sale.residual_amount <= 0:
+                try:
+                    cls.do_reconcile([sale])
+                except:
+                    pass
 
     @classmethod
     def do_reconcile(cls, sales):
+        print('ingresa to reconcile')
         Reconciliation = Pool().get('account.move.reconciliation')
+        Config = Pool().get('sale.configuration')
+        account_advance = Config(1).advance_account.id if Config(1).advance_account else None
         for sale in sales:
             reconcile_lines = []
+            advance_lines = []
             account_reconcile_id = None
             invoice_id = None
             if not sale.payments or not sale.number:
                 continue
             try:
+            # if 1:
                 for invoice in sale.invoices:
+                    print('ingresa a invoice')
                     if invoice.state == 'paid' or not invoice.move:
+                        print('no hace nada---')
                         continue
                     invoice_id = invoice.id
+                    invoice_ = invoice
 
                     account_reconcile_id = invoice.account.id
                     for line in invoice.payment_lines:
                         if not line.reconciliation and line.account.id == account_reconcile_id:
-                            reconcile_lines.append(line.id)
+                            reconcile_lines.append(line)
                     for l in invoice.move.lines:
                         if l.account.id == account_reconcile_id:
-                            reconcile_lines.append(l.id)
+                            reconcile_lines.append(l)
                             break
-
                 for st_line in sale.payments:
-                    st_line.invoice = invoice_id
-                    st_line.save()
+                    if st_line.account.id == invoice_.account.id: 
+                        st_line.invoice = invoice_id
+                        st_line.save()
+                    elif st_line.move and st_line.move.state != 'posted':
+                        st_line.move.post([st_line.move])
                     if not st_line.move:
                         st_line.create_move()
 
+
                     for ml in st_line.move.lines:
                         if not ml.reconciliation and ml.account.id == account_reconcile_id:
-                            reconcile_lines.append(ml.id)
-
-                if reconcile_lines:
+                            reconcile_lines.append(ml)
+                        if account_advance and not ml.reconciliation and ml.account.id == account_advance:
+                            advance_lines.append(ml)
+                if advance_lines:
+                    invoice_.create_cross_advance(advance_lines)
+                amount_reconcile = sum(l.debit-l.credit for l in reconcile_lines)
+                if reconcile_lines and amount_reconcile == 0:
                     Reconciliation.create([{
                         'lines': [('add', reconcile_lines)],
                         'date': TODAY,
                     }])
                 sale.write([sale], {'state': 'done'})
             except Exception:
+            # else:
                 print('Warning: Sale number not processed %s' % sale.number)
 
     @classmethod
diff --git a/view/sale_form.xml b/view/sale_form.xml
index 4531e22..bf7435f 100644
--- a/view/sale_form.xml
+++ b/view/sale_form.xml
@@ -51,11 +51,13 @@ copyright notices and license terms. -->
   </xpath>
   <xpath expr="/form/notebook/page/field[@name='shipment_method']"
           position="after">
-      <label name="shipment_date"/>
-      <field name="shipment_date"/>
-      <label name="self_pick_up"/>
-      <field name="self_pick_up"/>
-      <label name="pre_sale"/>
-      <field name="pre_sale"/>
+        <label name="shipment_date"/>
+        <field name="shipment_date"/>
+        <label name="self_pick_up"/>
+        <field name="self_pick_up"/>
+        <label name="pre_sale"/>
+        <field name="pre_sale"/>
+        <label name="reservation"/>
+        <field name="reservation"/>
   </xpath>
 </data>