diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..a3596c0
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+lxml
+requests
diff --git a/source/comerciodigital/comercio.py b/source/comerciodigital/comercio.py
index a67cbd3..16d725e 100644
--- a/source/comerciodigital/comercio.py
+++ b/source/comerciodigital/comercio.py
@@ -56,6 +56,7 @@ class PACComercioDigital(object):
         '000':  '000 Exitoso',
         '004':  '004 RFC {} ya esta dado de alta con Estatus=A',
         '704':  '704 Usuario Invalido',
+        '702':  '702  Error rfc/empresa invalido',
     }
     NS_CFDI = {
         'cfdi': 'http://www.sat.gob.mx/cfd/3',
@@ -337,6 +338,10 @@ class PACComercioDigital(object):
             self._error(result.text)
             return ''
 
+        if result.text == self.CODES['702']:
+            self._error(result.text)
+            return ''
+
         return result.text
 
     def client_add_timbres(self, data, auth={}):