diff --git a/CHANGES.md b/CHANGES.md
index e1a7e29ff..1c5ed2c00 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -9,7 +9,9 @@
 ### Changed
 
 * Added option for default route dependencies `*` can be used for `path` or `method` to match all allowed route. ([#705](https://github.com/stac-utils/stac-fastapi/pull/705))
-* moved `AsyncBaseFiltersClient` and `BaseFiltersClient` classes in `stac_fastapi.extensions.core.filter.client` submodule ([#704](https://github.com/stac-utils/stac-fastapi/pull/704))
+* Moved `AsyncBaseFiltersClient` and `BaseFiltersClient` classes in `stac_fastapi.extensions.core.filter.client` submodule ([#704](https://github.com/stac-utils/stac-fastapi/pull/704))
+* Removed `default_includes` from `stac_fastapi.types.config.ApiSettings` ([#706](https://github.com/stac-utils/stac-fastapi/pull/706))
+* Deprecated *Fields* extension `PostFieldsExtension.filter_fields` property ([#706](https://github.com/stac-utils/stac-fastapi/pull/706))
 
 ## [3.0.0a2] - 2024-05-31
 
diff --git a/docs/src/tips-and-tricks.md b/docs/src/tips-and-tricks.md
index a5ca8cb68..ef9a97ae8 100644
--- a/docs/src/tips-and-tricks.md
+++ b/docs/src/tips-and-tricks.md
@@ -45,3 +45,55 @@ For the landing page, you can set the API title, description and version using e
 - `STAC FASTAPI_TITLE` (string) should be a self-explanatory title for your API.
 - `STAC FASTAPI_DESCRIPTION` (string) should be a good description for your API. It can contain CommonMark.
 - `STAC_FASTAPI_LANDING_ID` (string) is a unique identifier for your Landing page.
+
+
+## Default `includes` in Fields extension (POST request)
+
+The [**Fields** API extension](https://github.com/stac-api-extensions/fields) enables to filter in/out STAC Items keys (e.g `geometry`). The default behavior is to not filter out anything, but this can be overridden by providing a custom `FieldsExtensionPostRequest` class:
+
+```python
+from typing import Optional, Set
+
+import attr
+from stac_fastapi.extensions import FieldsExtension as FieldsExtensionBase
+from stac_fastapi.extensions.core.fields import requests
+from pydantic import BaseModel, Field
+
+
+class PostFieldsExtension(requests.PostFieldsExtension):
+    include: Optional[Set[str]] = Field(
+        default_factory=lambda: {
+            "id",
+            "type",
+            "stac_version",
+            "geometry",
+            "bbox",
+            "links",
+            "assets",
+            "properties.datetime",
+            "collection",
+        }
+    )
+    exclude: Optional[Set[str]] = set()
+
+
+class FieldsExtensionPostRequest(BaseModel):
+    """Additional fields and schema for the POST request."""
+
+    fields: Optional[PostFieldsExtension] = Field(PostFieldsExtension())
+
+
+class FieldsExtension(FieldsExtensionBase):
+    """Override the POST model"""
+
+    POST = FieldsExtensionPostRequest
+
+
+from stac_fastapi.api.app import StacApi
+
+stac = StacApi(
+    extensions=[
+        FieldsExtension()
+    ]
+)
+```
diff --git a/stac_fastapi/api/stac_fastapi/api/app.py b/stac_fastapi/api/stac_fastapi/api/app.py
index 7eb7c4e80..5fe7f9d08 100644
--- a/stac_fastapi/api/stac_fastapi/api/app.py
+++ b/stac_fastapi/api/stac_fastapi/api/app.py
@@ -458,10 +458,6 @@ def __attrs_post_init__(self):
         self.client.title = self.title
         self.client.description = self.description
 
-        fields_ext = self.get_extension(FieldsExtension)
-        if fields_ext:
-            self.settings.default_includes = fields_ext.default_includes
-
         Settings.set(self.settings)
         self.app.state.settings = self.settings
 
diff --git a/stac_fastapi/api/tests/test_api.py b/stac_fastapi/api/tests/test_api.py
index deff0c070..d559a377a 100644
--- a/stac_fastapi/api/tests/test_api.py
+++ b/stac_fastapi/api/tests/test_api.py
@@ -2,7 +2,10 @@
 from starlette.testclient import TestClient
 
 from stac_fastapi.api.app import StacApi
-from stac_fastapi.extensions.core import TokenPaginationExtension, TransactionExtension
+from stac_fastapi.extensions.core import (
+    TokenPaginationExtension,
+    TransactionExtension,
+)
 from stac_fastapi.types import config, core
 
 
diff --git a/stac_fastapi/extensions/stac_fastapi/extensions/core/fields/fields.py b/stac_fastapi/extensions/stac_fastapi/extensions/core/fields/fields.py
index 25b6fe252..90b4b2697 100644
--- a/stac_fastapi/extensions/stac_fastapi/extensions/core/fields/fields.py
+++ b/stac_fastapi/extensions/stac_fastapi/extensions/core/fields/fields.py
@@ -1,6 +1,6 @@
 """Fields extension."""
 
-from typing import List, Optional, Set
+from typing import List, Optional
 
 import attr
 from fastapi import FastAPI
@@ -35,19 +35,6 @@ class FieldsExtension(ApiExtension):
     conformance_classes: List[str] = attr.ib(
         factory=lambda: ["https://api.stacspec.org/v1.0.0/item-search#fields"]
     )
-    default_includes: Set[str] = attr.ib(
-        factory=lambda: {
-            "id",
-            "type",
-            "stac_version",
-            "geometry",
-            "bbox",
-            "links",
-            "assets",
-            "properties.datetime",
-            "collection",
-        }
-    )
     schema_href: Optional[str] = attr.ib(default=None)
 
     def register(self, app: FastAPI) -> None:
diff --git a/stac_fastapi/extensions/stac_fastapi/extensions/core/fields/request.py b/stac_fastapi/extensions/stac_fastapi/extensions/core/fields/request.py
index 4cfbd3293..e08572ca0 100644
--- a/stac_fastapi/extensions/stac_fastapi/extensions/core/fields/request.py
+++ b/stac_fastapi/extensions/stac_fastapi/extensions/core/fields/request.py
@@ -1,11 +1,11 @@
 """Request models for the fields extension."""
 
+import warnings
 from typing import Dict, Optional, Set
 
 import attr
 from pydantic import BaseModel, Field
 
-from stac_fastapi.types.config import Settings
 from stac_fastapi.types.search import APIRequest, str2list
 
 
@@ -39,6 +39,7 @@ def _get_field_dict(fields: Optional[Set[str]]) -> Dict:
                         field_dict[parent].add(key)
             else:
                 field_dict[field] = ...  # type:ignore
+
         return field_dict
 
     @property
@@ -49,10 +50,17 @@ def filter_fields(self) -> Dict:
         the included and excluded fields passed to the API
         Ref: https://pydantic-docs.helpmanual.io/usage/exporting_models/#advanced-include-and-exclude
         """
+        warnings.warn(
+            """The `PostFieldsExtension.filter_fields`
+            method is deprecated and will be removed in 3.0.""",
+            DeprecationWarning,
+            stacklevel=1,
+        )
+
         # Always include default_includes, even if they
         # exist in the exclude list.
         include = (self.include or set()) - (self.exclude or set())
-        include |= Settings.get().default_includes or set()
+        include |= set()
 
         return {
             "include": self._get_field_dict(include),
diff --git a/stac_fastapi/types/stac_fastapi/types/config.py b/stac_fastapi/types/stac_fastapi/types/config.py
index d692043cc..75d0bd399 100644
--- a/stac_fastapi/types/stac_fastapi/types/config.py
+++ b/stac_fastapi/types/stac_fastapi/types/config.py
@@ -1,6 +1,6 @@
 """stac_fastapi.types.config module."""
 
-from typing import Optional, Set
+from typing import Optional
 
 from pydantic_settings import BaseSettings, SettingsConfigDict
 
@@ -19,10 +19,6 @@ class ApiSettings(BaseSettings):
             as distinct columns in the database.
     """
 
-    # TODO: Remove `default_includes` attribute so we can use
-    # `pydantic.BaseSettings` instead
-    default_includes: Optional[Set[str]] = None
-
     stac_fastapi_title: str = "stac-fastapi"
     stac_fastapi_description: str = "stac-fastapi"
     stac_fastapi_version: str = "0.1"