diff --git a/source/app/controllers/pacs/cfdi_cert.py b/source/app/controllers/pacs/cfdi_cert.py
index 778b826..637c843 100644
--- a/source/app/controllers/pacs/cfdi_cert.py
+++ b/source/app/controllers/pacs/cfdi_cert.py
@@ -30,6 +30,7 @@ class SATCertificate(object):
     def _init_values(self):
         self._rfc = ''
         self._serial_number = ''
+        self._subject = ''
         self._not_before = None
         self._not_after = None
         self._is_fiel = False
@@ -67,6 +68,10 @@ class SATCertificate(object):
     def _get_data_cer(self, cer):
         self._cer = cer
         obj = x509.load_der_x509_certificate(cer, default_backend())
+
+        # ~ print(1, obj.issuer.rfc4514_string())
+        self._subject = obj.subject.rfc4514_string()
+
         self._rfc = obj.subject.get_attributes_for_oid(
             NameOID.X500_UNIQUE_IDENTIFIER)[0].value.split(' ')[0]
         self._serial_number = '{0:x}'.format(obj.serial_number)[1::2]
@@ -152,11 +157,16 @@ class SATCertificate(object):
         node = xmlsec.tree.find_node(tree, 'X509Certificate')
         node.text = self.cer_txt
 
-        # ~ node = xmlsec.tree.find_node(tree, 'SignatureValue')
-        # ~ node.text = node.text.replace('\n', '')
+        node = xmlsec.tree.find_node(tree, 'X509IssuerName')
+        node.text = self.subject
+        node = xmlsec.tree.find_node(tree, 'X509SerialNumber')
+        node.text = self.serial_number
 
-        # ~ node = xmlsec.tree.find_node(tree, 'Modulus')
-        # ~ node.text = node.text.replace('\n', '')
+        node = xmlsec.tree.find_node(tree, 'SignatureValue')
+        node.text = node.text.replace('\n', '')
+
+        node = xmlsec.tree.find_node(tree, 'Modulus')
+        node.text = node.text.replace('\n', '')
 
         return tree
 
@@ -168,6 +178,10 @@ class SATCertificate(object):
     def serial_number(self):
         return self._serial_number
 
+    @property
+    def subject(self):
+        return self._subject
+
     @property
     def not_before(self):
         return self._not_before
diff --git a/source/app/settings.py b/source/app/settings.py
index 3205459..227d193 100644
--- a/source/app/settings.py
+++ b/source/app/settings.py
@@ -250,6 +250,34 @@ DEFAULT_GLOBAL = {
     'clave_sat': '01010101',
 }
 
+# ~ TEMPLATE_CANCEL = """<Cancelacion RfcEmisor="{rfc}" Fecha="{fecha}" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://cancelacfd.sat.gob.mx">
+  # ~ <Folios>
+    # ~ <UUID>{uuid}</UUID>
+  # ~ </Folios>
+  # ~ <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
+    # ~ <SignedInfo>
+      # ~ <CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />
+      # ~ <SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />
+      # ~ <Reference URI="">
+        # ~ <Transforms>
+          # ~ <Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />
+        # ~ </Transforms>
+        # ~ <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />
+        # ~ <DigestValue />
+      # ~ </Reference>
+    # ~ </SignedInfo>
+    # ~ <SignatureValue />
+    # ~ <KeyInfo>
+      # ~ <X509Data>
+        # ~ <X509SubjectName />
+        # ~ <X509IssuerSerial />
+        # ~ <X509Certificate />
+      # ~ </X509Data>
+      # ~ <KeyValue />
+    # ~ </KeyInfo>
+  # ~ </Signature>
+# ~ </Cancelacion>
+# ~ """
 TEMPLATE_CANCEL = """<Cancelacion RfcEmisor="{rfc}" Fecha="{fecha}" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://cancelacfd.sat.gob.mx">
   <Folios>
     <UUID>{uuid}</UUID>
@@ -268,12 +296,14 @@ TEMPLATE_CANCEL = """<Cancelacion RfcEmisor="{rfc}" Fecha="{fecha}" xmlns:xsi="h
     </SignedInfo>
     <SignatureValue />
     <KeyInfo>
-      <X509Data>
-        <X509SubjectName />
-        <X509IssuerSerial />
-        <X509Certificate />
-      </X509Data>
-      <KeyValue />
+        <X509Data>
+          <X509IssuerSerial>
+            <X509IssuerName />
+            <X509SerialNumber />
+          </X509IssuerSerial>
+          <X509Certificate />
+        </X509Data>
+        <KeyValue />
     </KeyInfo>
   </Signature>
 </Cancelacion>