diff --git a/source/app/controllers/util.py b/source/app/controllers/util.py
index 9d0bfb9..7e16b57 100644
--- a/source/app/controllers/util.py
+++ b/source/app/controllers/util.py
@@ -1192,25 +1192,46 @@ def get_bool(value):
 
 class ImportFacturaLibre(object):
 
-    def __init__(self, path):
+    def __init__(self, path, rfc):
+        self._rfc = rfc
         self._con = None
         self._cursor = None
         self._is_connect = self._connect(path)
         self._clientes = []
         self._clientes_rfc = []
+        self._error = ''
+
+    @property
+    def error(self):
+        return self._error
 
     @property
     def is_connect(self):
         return self._is_connect
 
+    def _validate_rfc(self):
+        sql = "SELECT rfc FROM emisor LIMIT 1"
+        self._cursor.execute(sql)
+        obj = self._cursor.fetchone()
+        if obj is None:
+            self._error = 'No se encontró al emisor: {}'.format(self._rfc)
+            return False
+
+        if obj['rfc'] != self._rfc:
+            self._error = 'Los datos no corresponden al emisor: {}'.format(self._rfc)
+            return False
+
+        return True
+
     def _connect(self, path):
         try:
             self._con = sqlite3.connect(path)
             self._con.row_factory = sqlite3.Row
             self._cursor = self._con.cursor()
-            return True
+            return self._validate_rfc()
         except Exception as e:
             log.error(e)
+            self._error = 'No se pudo conectar a la base de datos'
             return False
 
     def close(self):
diff --git a/source/app/models/db.py b/source/app/models/db.py
index c53fdfc..b7db743 100644
--- a/source/app/models/db.py
+++ b/source/app/models/db.py
@@ -14,6 +14,9 @@ class StorageEngine(object):
     def get_values(self, table, values=None):
         return getattr(self, '_get_{}'.format(table))(values)
 
+    def _get_validartimbrar(self, values):
+        return main.validar_timbrar()
+
     def _get_preproductos(self, values):
         return main.PreFacturasDetalle.facturar(values['id'])
 
diff --git a/source/app/models/main.py b/source/app/models/main.py
index c0825e8..c37721a 100644
--- a/source/app/models/main.py
+++ b/source/app/models/main.py
@@ -67,6 +67,40 @@ def upload_file(rfc, opt, file_obj):
     return result
 
 
+def validar_timbrar():
+    try:
+        obj = Emisor.select()[0]
+    except IndexError:
+        msg = 'Es necesario agregar los datos del emisor'
+        return {'ok': False, 'msg': msg}
+
+    try:
+        obj = Folios.select()[0]
+    except IndexError:
+        msg = 'Es necesaria al menos una serie de folios'
+        return {'ok': False, 'msg': msg}
+
+    msg = 'Es necesario configurar un certificado de sellos'
+    try:
+        obj = Certificado.select()[0]
+    except IndexError:
+        return {'ok': False, 'msg': msg}
+
+    if not obj.serie:
+        return {'ok': False, 'msg': msg}
+
+    dias = obj.hasta - util.now()
+    if dias.days < 0:
+        msg = 'El certificado ha vencido, es necesario cargar uno nuevo'
+        return {'ok': False, 'msg': msg}
+
+    msg = ''
+    if dias.days < 15:
+        msg = 'El certificado vence en: {} días.'.format(dias.days)
+
+    return {'ok': True, 'msg': msg}
+
+
 class Configuracion(BaseModel):
     clave = TextField(unique=True)
     valor = TextField(default='')
@@ -288,7 +322,11 @@ class Emisor(BaseModel):
 
     @classmethod
     def get_regimenes(cls):
-        obj = Emisor.select()[0]
+        try:
+            obj = Emisor.select()[0]
+        except IndexError:
+            return ()
+
         rows = [{'id': row.key, 'value': row.name} for row in obj.regimenes]
         return tuple(rows)
 
@@ -2699,9 +2737,9 @@ def _importar_factura_libre(archivo):
     conectar(args)
 
     log.info('Importando datos...')
-    app = util.ImportFacturaLibre(archivo)
+    app = util.ImportFacturaLibre(archivo, rfc)
     if not app.is_connect:
-        log.error('\tNo se pudo conectar a la base de datos')
+        log.error('\t{}'.format(app.error))
         return
 
     data = app.import_data()
diff --git a/source/static/js/controller/admin.js b/source/static/js/controller/admin.js
index 130e675..a89afa3 100644
--- a/source/static/js/controller/admin.js
+++ b/source/static/js/controller/admin.js
@@ -392,9 +392,9 @@ function cmd_subir_certificado_click(){
         return
     }
 
-    var rfc = $$('form_cert').getValues()['cert_rfc']
+    var serie = $$('form_cert').getValues()['cert_serie']
 
-    if(rfc){
+    if(serie){
         msg = 'Ya existe un certificado guardado<BR><BR>¿Deseas reemplazarlo?'
         webix.confirm({
             title: 'Certificado Existente',
diff --git a/source/static/js/controller/invoices.js b/source/static/js/controller/invoices.js
index 9bf0193..f486f06 100644
--- a/source/static/js/controller/invoices.js
+++ b/source/static/js/controller/invoices.js
@@ -95,6 +95,19 @@ function default_config(){
     get_regimen_fiscal()
     table_pt.clear()
     table_totals.clear()
+
+    webix.ajax().sync().get('/values/validartimbrar', function(text, data){
+        var values = data.json()
+        if(!values.ok){
+            msg_error(values.msg)
+            $$('cmd_timbrar').disable()
+        }else{
+            if(values.msg){
+                msg_error(values.msg)
+            }
+            $$('cmd_timbrar').enable()
+        }
+    })
 }