diff --git a/source/app/models/main.py b/source/app/models/main.py
index 4dc8d69..14b0e1b 100644
--- a/source/app/models/main.py
+++ b/source/app/models/main.py
@@ -6746,9 +6746,16 @@ class CfdiPagos(BaseModel):
             data = {'ok': False, 'msg': msg}
             return data
 
-        auth = Configuracion.get_({'fields': 'pac_auth'})
+        # ~ auth = Configuracion.get_({'fields': 'pac_auth'})
+        # ~ certificado = Certificado.get(Certificado.es_fiel==False)
+        # ~ result = utils.cancel_xml_sign(last, auth, certificado)
+
+        pac = utils.get_pac_by_rfc(last.xml)
+        auth = Configuracion.get_({'fields': 'auth_by_pac', 'pac': pac})
+
         certificado = Certificado.get(Certificado.es_fiel==False)
         result = utils.cancel_xml_sign(last, auth, certificado)
+
         if result['ok']:
             last.estatus = 'Cancelada'
             last.error = ''