diff --git a/source/app/models/main.py b/source/app/models/main.py
index 92de5a2..42db1e1 100644
--- a/source/app/models/main.py
+++ b/source/app/models/main.py
@@ -23,6 +23,7 @@ import sqlite3
 from peewee import *
 from playhouse.fields import PasswordField, ManyToManyField
 from playhouse.shortcuts import case, SQL, cast
+from psycopg2.errors import UniqueViolation
 
 
 if __name__ == '__main__':
@@ -2221,7 +2222,7 @@ class CuentasBanco(BaseModel):
         with database_proxy.transaction():
             try:
                 obj = CuentasBanco.create(**values)
-            except IntegrityError:
+            except (IntegrityError, UniqueViolation):
                 msg = 'Esta cuenta ya existe'
                 return {'ok': False, 'msg': msg}
 
diff --git a/source/static/js/controller/bancos.js b/source/static/js/controller/bancos.js
index 45a5b9f..2f6eb05 100644
--- a/source/static/js/controller/bancos.js
+++ b/source/static/js/controller/bancos.js
@@ -578,13 +578,13 @@ function validate_deposito(values){
         return false
     }
 
-    if(grid.count() && current_currency!=CURRENCY_MN){
-        if(type_change <= 1.0){
-            msg = 'El Tipo de Cambio debe ser mayor a 1.00'
-            msg_error(msg)
-            return false
-        }
-    }
+    //~ if(grid.count() && current_currency!=CURRENCY_MN){
+        //~ if(type_change <= 1.0){
+            //~ msg = 'El Tipo de Cambio debe ser mayor a 1.00'
+            //~ msg_error(msg)
+            //~ return false
+        //~ }
+    //~ }
 
     var today = new Date()
     if(values.deposito_fecha > today){
diff --git a/source/static/js/controller/invoices.js b/source/static/js/controller/invoices.js
index 24eab91..efeea72 100644
--- a/source/static/js/controller/invoices.js
+++ b/source/static/js/controller/invoices.js
@@ -296,6 +296,8 @@ function cmd_new_invoice_click(){
     lst.setValue('')
     lst.getList().clearAll()
 
+    $$('date_invoice').setValue(Date())
+
     form.focus('search_client_name')
 }
 
@@ -360,6 +362,14 @@ function cmd_delete_invoice_click(id, e, node){
 
 function validate_invoice(values){
 
+    var date_invoice = $$('date_invoice').getValue()
+    if(date_invoice == null){
+        msg = 'La fecha es requerida'
+        msg_error(msg)
+        $$('date_invoice').setFocus()
+        return false
+    }
+
     var usar_cartaporte = $$('chk_cfdi_usar_cartaporte').getValue()
     if(usar_cartaporte){
         value = $$('lst_carta_UnidadPeso').getValue()
@@ -822,6 +832,7 @@ function cmd_timbrar_click(id, e, node){
     }
 
     var values = form.getValues()
+
     if(!validate_invoice(values)){
         return
     }
diff --git a/source/static/js/ui/invoices.js b/source/static/js/ui/invoices.js
index e4d5dbc..c622432 100644
--- a/source/static/js/ui/invoices.js
+++ b/source/static/js/ui/invoices.js
@@ -485,8 +485,11 @@ var suggest_students = {
 }
 
 
-var body_comprobante = {rows: [{
-    cols: [
+var body_comprobante = {rows: [
+    {view: 'datepicker', id: 'date_invoice', label: 'Fecha', format: '%d-%F-%Y',
+        required: true, invalidMessage: 'Selecciona una fecha', hidden: true
+        },
+    {cols: [
         {
             view: 'richselect',
             id: 'lst_tipo_comprobante',