diff --git a/src/cl_sii/dte/data_models.py b/src/cl_sii/dte/data_models.py
index 73f1b9a4..673bf92c 100644
--- a/src/cl_sii/dte/data_models.py
+++ b/src/cl_sii/dte/data_models.py
@@ -918,3 +918,6 @@ def validate_referencias_codigo_ref_is_consistent_with_tipo_dte(self) -> DteXmlD
                     )
 
         return self
+
+
+DTE_XML_DATA_PYDANTIC_TYPE_ADAPTER = pydantic.TypeAdapter(DteXmlData)
diff --git a/src/cl_sii/dte/parse.py b/src/cl_sii/dte/parse.py
index 0b5ddf80..fae2912c 100644
--- a/src/cl_sii/dte/parse.py
+++ b/src/cl_sii/dte/parse.py
@@ -117,7 +117,7 @@ def validate_dte_xml(xml_doc: XmlElement) -> None:
     xml_utils.validate_xml_doc(DTE_XML_SCHEMA_OBJ, xml_doc)
 
 
-def parse_dte_xml(xml_doc: XmlElement) -> data_models.DteXmlData:
+def parse_dte_xml(xml_doc: XmlElement, trust_input: bool = False) -> data_models.DteXmlData:
     """
     Parse data from a DTE XML doc.
 
@@ -125,6 +125,16 @@ def parse_dte_xml(xml_doc: XmlElement) -> data_models.DteXmlData:
         It is assumed that ``xml_doc`` is an
         ``{http://www.sii.cl/SiiDte}/DTE``  XML element.
 
+    :param xml_doc:
+        DTE XML document.
+    :param trust_input:
+        If ``True``, the input data is trusted to be valid and
+        some validation errors are replaced by warnings.
+
+        .. warning::
+            Use this option *only* if the DTE XML document was obtained directly
+            from the SII *and* you need to work around some validation errors
+            that the SII should have caught, but let through.
     :raises ValueError:
     :raises TypeError:
     :raises NotImplementedError:
@@ -511,23 +521,28 @@ def parse_dte_xml(xml_doc: XmlElement) -> data_models.DteXmlData:
         _text_strip_or_raise(signature_key_info_x509_cert_em)
     )
 
-    return data_models.DteXmlData(
-        emisor_rut=emisor_rut_value,
-        tipo_dte=tipo_dte_value,
-        folio=folio_value,
-        fecha_emision_date=fecha_emision_value,
-        receptor_rut=receptor_rut_value,
-        monto_total=monto_total_value,
-        emisor_razon_social=emisor_razon_social_value,
-        receptor_razon_social=receptor_razon_social_value,
-        fecha_vencimiento_date=fecha_vencimiento_value,
-        firma_documento_dt=tmst_firma_value,
-        signature_value=signature_signature_value,
-        signature_x509_cert_der=signature_key_info_x509_cert_der,
-        emisor_giro=emisor_giro_value,
-        emisor_email=emisor_email_value,
-        receptor_email=receptor_email_value,
-        referencias=referencia_xml_list,
+    return data_models.DTE_XML_DATA_PYDANTIC_TYPE_ADAPTER.validate_python(
+        dict(
+            emisor_rut=emisor_rut_value,
+            tipo_dte=tipo_dte_value,
+            folio=folio_value,
+            fecha_emision_date=fecha_emision_value,
+            receptor_rut=receptor_rut_value,
+            monto_total=monto_total_value,
+            emisor_razon_social=emisor_razon_social_value,
+            receptor_razon_social=receptor_razon_social_value,
+            fecha_vencimiento_date=fecha_vencimiento_value,
+            firma_documento_dt=tmst_firma_value,
+            signature_value=signature_signature_value,
+            signature_x509_cert_der=signature_key_info_x509_cert_der,
+            emisor_giro=emisor_giro_value,
+            emisor_email=emisor_email_value,
+            receptor_email=receptor_email_value,
+            referencias=referencia_xml_list,
+        ),
+        context={
+            data_models.VALIDATION_CONTEXT_TRUST_INPUT: trust_input,
+        },
     )
 
 
diff --git a/src/cl_sii/rtc/data_models_aec.py b/src/cl_sii/rtc/data_models_aec.py
index 271af93e..94481e57 100644
--- a/src/cl_sii/rtc/data_models_aec.py
+++ b/src/cl_sii/rtc/data_models_aec.py
@@ -798,3 +798,6 @@ def validate_signature_value_and_signature_x509_cert_der_may_only_be_none_togeth
             )
 
         return self
+
+
+AEC_XML_PYDANTIC_TYPE_ADAPTER = pydantic.TypeAdapter(AecXml)
diff --git a/src/cl_sii/rtc/parse_aec.py b/src/cl_sii/rtc/parse_aec.py
index 54ee4f96..ffbdc65e 100644
--- a/src/cl_sii/rtc/parse_aec.py
+++ b/src/cl_sii/rtc/parse_aec.py
@@ -26,7 +26,7 @@
 import cl_sii.dte.data_models
 import cl_sii.dte.parse
 from cl_sii.dte.constants import TipoDte
-from cl_sii.dte.data_models import DteXmlData
+from cl_sii.dte.data_models import DteXmlData, is_input_trusted_according_to_validation_context
 from cl_sii.dte.parse import DTE_XMLNS_MAP
 from cl_sii.libs import encoding_utils, tz_utils, xml_utils
 from cl_sii.libs.xml_utils import XmlElement
@@ -88,7 +88,7 @@ def parse_aec_xml(xml_doc: XmlElement, trust_input: bool = False) -> data_models
             that the SII should have caught, but let through.
     """
     aec_struct = _Aec.parse_xml(xml_doc, trust_input=trust_input)
-    return aec_struct.as_aec_xml()
+    return aec_struct.as_aec_xml(trust_input=trust_input)
 
 
 ###############################################################################
@@ -656,10 +656,11 @@ def parse_xml_to_dict(xml_em: XmlElement) -> Mapping[str, object]:
 
     @pydantic.field_validator('dte', mode='before')
     @classmethod
-    def validate_dte(cls, v: object) -> object:
+    def validate_dte(cls, v: object, info: pydantic.ValidationInfo) -> object:
         if isinstance(v, XmlElement):
             cl_sii.dte.parse.validate_dte_xml(v)
-            v = cl_sii.dte.parse.parse_dte_xml(v)
+            trust_dte = is_input_trusted_according_to_validation_context(info.context)
+            v = cl_sii.dte.parse.parse_dte_xml(v, trust_input=trust_dte)
         return v
 
     # @pydantic.validator('tmst_firma')
@@ -909,7 +910,7 @@ def parse_xml(cls, xml_doc: XmlElement, trust_input: bool = False) -> _Aec:
             },
         )
 
-    def as_aec_xml(self) -> data_models_aec.AecXml:
+    def as_aec_xml(self, trust_input: bool = False) -> data_models_aec.AecXml:
         doc_aec_struct = self.documento_aec
         signature_over_doc_aec_struct = self.signature
 
@@ -922,17 +923,22 @@ def as_aec_xml(self) -> data_models_aec.AecXml:
             cesion_struct.as_cesion_aec_xml() for cesion_struct in cesion_struct_list
         ]
 
-        return data_models_aec.AecXml(
-            dte=dte,
-            cedente_rut=caratula_struct.rut_cedente,
-            cesionario_rut=caratula_struct.rut_cesionario,
-            fecha_firma_dt=caratula_struct.tmst_firmaenvio,
-            signature_value=signature_over_doc_aec_struct.signature_value,
-            signature_x509_cert_der=signature_over_doc_aec_struct.key_info_x509_data_x509_cert,
-            cesiones=aec_xml_cesion_list,
-            contacto_nombre=caratula_struct.nmb_contacto,
-            contacto_telefono=caratula_struct.fono_contacto,
-            contacto_email=caratula_struct.mail_contacto,
+        return data_models_aec.AEC_XML_PYDANTIC_TYPE_ADAPTER.validate_python(
+            dict(
+                dte=dte,
+                cedente_rut=caratula_struct.rut_cedente,
+                cesionario_rut=caratula_struct.rut_cesionario,
+                fecha_firma_dt=caratula_struct.tmst_firmaenvio,
+                signature_value=signature_over_doc_aec_struct.signature_value,
+                signature_x509_cert_der=signature_over_doc_aec_struct.key_info_x509_data_x509_cert,
+                cesiones=aec_xml_cesion_list,
+                contacto_nombre=caratula_struct.nmb_contacto,
+                contacto_telefono=caratula_struct.fono_contacto,
+                contacto_email=caratula_struct.mail_contacto,
+            ),
+            context={
+                cl_sii.dte.data_models.VALIDATION_CONTEXT_TRUST_INPUT: trust_input,
+            },
         )
 
     @staticmethod
diff --git a/src/tests/test_dte_data_models.py b/src/tests/test_dte_data_models.py
index 94f39fd2..d88b48a9 100644
--- a/src/tests/test_dte_data_models.py
+++ b/src/tests/test_dte_data_models.py
@@ -14,6 +14,7 @@
     TipoDte,
 )
 from cl_sii.dte.data_models import (  # noqa: F401
+    DTE_XML_DATA_PYDANTIC_TYPE_ADAPTER,
     VALIDATION_CONTEXT_TRUST_INPUT,
     DteDataL0,
     DteDataL1,
@@ -1062,8 +1063,6 @@ def setUpClass(cls) -> None:
             'test_data/sii-crypto/DTE--96670340-7--61--110616-cert.der'
         )
 
-        cls.dte_xml_data_pydantic_type_adapter = pydantic.TypeAdapter(DteXmlData)
-
     def setUp(self) -> None:
         super().setUp()
 
@@ -1788,7 +1787,7 @@ def test_validate_referencias_rut_otro_is_consistent_with_tipo_dte_for_trusted_i
         )
 
         invalid_but_trusted_obj: Mapping[str, object] = {
-            **self.dte_xml_data_pydantic_type_adapter.dump_python(obj),
+            **DTE_XML_DATA_PYDANTIC_TYPE_ADAPTER.dump_python(obj),
             **dict(
                 referencias=[obj_referencia],
             ),
@@ -1797,7 +1796,7 @@ def test_validate_referencias_rut_otro_is_consistent_with_tipo_dte_for_trusted_i
 
         try:
             with self.assertLogs('cl_sii.dte.data_models', level='WARNING') as assert_logs_cm:
-                self.dte_xml_data_pydantic_type_adapter.validate_python(
+                DTE_XML_DATA_PYDANTIC_TYPE_ADAPTER.validate_python(
                     invalid_but_trusted_obj, context=validation_context
                 )
         except pydantic.ValidationError as exc:
@@ -1876,7 +1875,7 @@ def test_validate_referencias_rut_otro_is_consistent_with_emisor_rut_for_trusted
         )
 
         invalid_but_trusted_obj: Mapping[str, object] = {
-            **self.dte_xml_data_pydantic_type_adapter.dump_python(obj),
+            **DTE_XML_DATA_PYDANTIC_TYPE_ADAPTER.dump_python(obj),
             **dict(
                 referencias=[obj_referencia],
             ),
@@ -1885,7 +1884,7 @@ def test_validate_referencias_rut_otro_is_consistent_with_emisor_rut_for_trusted
 
         try:
             with self.assertLogs('cl_sii.dte.data_models', level='WARNING') as assert_logs_cm:
-                self.dte_xml_data_pydantic_type_adapter.validate_python(
+                DTE_XML_DATA_PYDANTIC_TYPE_ADAPTER.validate_python(
                     invalid_but_trusted_obj, context=validation_context
                 )
         except pydantic.ValidationError as exc: