diff --git a/facho/fe/fe.py b/facho/fe/fe.py
index 6ab90d4..c539c43 100644
--- a/facho/fe/fe.py
+++ b/facho/fe/fe.py
@@ -34,6 +34,7 @@ POLICY_NAME = u'Política de firma para facturas electrónicas de la República
 
 NAMESPACES = {
     'facho': 'http://git.disroot.org/Etrivial/facho',
+    'atd': 'urn:oasis:names:specification:ubl:schema:xsd:AttachedDocument-2',
     'fe': 'http://www.dian.gov.co/contratos/facturaelectronica/v1',
     'cac': 'urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2',
     'cbc': 'urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2',
diff --git a/facho/fe/form_xml/__init__.py b/facho/fe/form_xml/__init__.py
index 72d4c99..b7530fa 100644
--- a/facho/fe/form_xml/__init__.py
+++ b/facho/fe/form_xml/__init__.py
@@ -2,3 +2,4 @@ from .invoice import *
 from .credit_note import *
 from .debit_note import *
 from .utils import *
+from .attached_document import *
diff --git a/facho/fe/form_xml/attached_document.py b/facho/fe/form_xml/attached_document.py
new file mode 100644
index 0000000..ae3df9b
--- /dev/null
+++ b/facho/fe/form_xml/attached_document.py
@@ -0,0 +1,14 @@
+from .. import fe
+
+__all__ = ['AttachedDocument']
+
+class AttachedDocument():
+
+    def __init__(self, id):
+        schema = 'urn:oasis:names:specification:ubl:schema:xsd:AttachedDocument-2'
+        self.fexml = fe.FeXML('AttachedDocument', schema)
+        self.fexml.set_element('./cbc:ID', id)
+
+    def toFachoXML(self):
+        return self.fexml
+        
diff --git a/tests/test_attached_document.py b/tests/test_attached_document.py
new file mode 100644
index 0000000..0e58be9
--- /dev/null
+++ b/tests/test_attached_document.py
@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# This file is part of facho.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+from datetime import datetime
+
+import pytest
+from facho.fe import form_xml
+
+import helpers
+
+def test_xml_with_required_elements():
+    doc = form_xml.AttachedDocument(id='123')
+
+    xml = doc.toFachoXML()
+    assert xml.get_element_text('/atd:AttachedDocument/cbc:ID') == '123'
+