diff --git a/cl_sii/rtc/data_models_aec.py b/cl_sii/rtc/data_models_aec.py
index e5969575..62b6d4a6 100644
--- a/cl_sii/rtc/data_models_aec.py
+++ b/cl_sii/rtc/data_models_aec.py
@@ -703,21 +703,24 @@ def validate_cesiones_seq_order(cls, v: object) -> object:
                     raise ValueError("items must be ordered according to their 'seq'")
         return v
 
-    @pydantic.validator('cesiones')
-    def validate_cesiones_monto_cesion_must_not_increase(cls, v: object) -> object:
-        if isinstance(v, Sequence):
-            if len(v) >= 2:
-                previous_cesion: Optional[CesionAecXml] = None
-                for cesion in v:
-                    if previous_cesion is not None:
-                        if not (cesion.monto_cesion <= previous_cesion.monto_cesion):
-                            raise ValueError(
-                                "items must have a 'monto_cesion'"
-                                " that does not exceed the previous item's 'monto_cesion'.",
-                            )
-                    previous_cesion = cesion
-
-        return v
+    # Note: Even though this validation seems to make perfect sense, there are some
+    # real cases of SII-approved AEC where this is not fulfilled.
+    # We will keep this validation in case we need it in the future.
+    # @pydantic.validator('cesiones')
+    # def validate_cesiones_monto_cesion_must_not_increase(cls, v: object) -> object:
+    #     if isinstance(v, Sequence):
+    #         if len(v) >= 2:
+    #             previous_cesion: Optional[CesionAecXml] = None
+    #             for cesion in v:
+    #                 if previous_cesion is not None:
+    #                     if not (cesion.monto_cesion <= previous_cesion.monto_cesion):
+    #                         raise ValueError(
+    #                             "items must have a 'monto_cesion'"
+    #                             " that does not exceed the previous item's 'monto_cesion'.",
+    #                         )
+    #                 previous_cesion = cesion
+
+    #     return v
 
     @pydantic.root_validator(skip_on_failure=True)
     def validate_dte_matches_cesiones_dtes(
diff --git a/tests/test_rtc_data_models_aec.py b/tests/test_rtc_data_models_aec.py
index ea1b257e..d469371d 100644
--- a/tests/test_rtc_data_models_aec.py
+++ b/tests/test_rtc_data_models_aec.py
@@ -574,37 +574,37 @@ def test_validate_cesiones_seq_order(self) -> None:
         for expected_validation_error in expected_validation_errors:
             self.assertIn(expected_validation_error, validation_errors)
 
-    def test_validate_cesiones_monto_cesion_must_not_increase(self) -> None:
-        self._set_obj_1()
-
-        obj = self.obj_1
-
-        expected_validation_errors = [
-            {
-                'loc': ('cesiones',),
-                'msg':
-                    "items must have a 'monto_cesion'"
-                    " that does not exceed the previous item's 'monto_cesion'.",
-                'type': 'value_error',
-            },
-        ]
-
-        with self.assertRaises(pydantic.ValidationError) as assert_raises_cm:
-            dataclasses.replace(
-                obj,
-                cesiones=[
-                    dataclasses.replace(
-                        obj.cesiones[0],
-                        monto_cesion=obj.cesiones[1].monto_cesion - 1,
-                    ),
-                    obj.cesiones[1],
-                ],
-            )
-
-        validation_errors = assert_raises_cm.exception.errors()
-        self.assertEqual(len(validation_errors), len(expected_validation_errors))
-        for expected_validation_error in expected_validation_errors:
-            self.assertIn(expected_validation_error, validation_errors)
+    # def test_validate_cesiones_monto_cesion_must_not_increase(self) -> None:
+    #     self._set_obj_1()
+
+    #     obj = self.obj_1
+
+    #     expected_validation_errors = [
+    #         {
+    #             'loc': ('cesiones',),
+    #             'msg':
+    #                 "items must have a 'monto_cesion'"
+    #                 " that does not exceed the previous item's 'monto_cesion'.",
+    #             'type': 'value_error',
+    #         },
+    #     ]
+
+    #     with self.assertRaises(pydantic.ValidationError) as assert_raises_cm:
+    #         dataclasses.replace(
+    #             obj,
+    #             cesiones=[
+    #                 dataclasses.replace(
+    #                     obj.cesiones[0],
+    #                     monto_cesion=obj.cesiones[1].monto_cesion - 1,
+    #                 ),
+    #                 obj.cesiones[1],
+    #             ],
+    #         )
+
+    #     validation_errors = assert_raises_cm.exception.errors()
+    #     self.assertEqual(len(validation_errors), len(expected_validation_errors))
+    #     for expected_validation_error in expected_validation_errors:
+    #         self.assertIn(expected_validation_error, validation_errors)
 
     def test_validate_dte_matches_cesiones_dtes(self) -> None:
         self._set_obj_1()