diff --git a/rest_api/rest_api/controller/search.py b/rest_api/rest_api/controller/search.py
index 038d71347..e5747f206 100644
--- a/rest_api/rest_api/controller/search.py
+++ b/rest_api/rest_api/controller/search.py
@@ -1,6 +1,5 @@
 from typing import Dict, Any
 
-from collections.abc import Mapping
 import logging
 import time
 import json
@@ -65,16 +64,6 @@ def _process_request(pipeline, request) -> Dict[str, Any]:
     start_time = time.time()
 
     params = request.params or {}
-
-    # format global, top-level filters (e.g. "params": {"filters": {"name": ["some"]}})
-    if "filters" in params.keys():
-        params["filters"] = _format_filters(params["filters"])
-
-    # format targeted node filters (e.g. "params": {"Retriever": {"filters": {"value"}}})
-    for key in params.keys():
-        if isinstance(params[key], Mapping) and "filters" in params[key].keys():
-            params[key]["filters"] = _format_filters(params[key]["filters"])
-
     result = pipeline.run(query=request.query, params=params, debug=request.debug)
 
     # Ensure answers and documents exist, even if they're empty lists
@@ -87,39 +76,3 @@ def _process_request(pipeline, request) -> Dict[str, Any]:
         json.dumps({"request": request, "response": result, "time": f"{(time.time() - start_time):.2f}"}, default=str)
     )
     return result
-
-
-def _format_filters(filters):
-    """
-    Adjust filters to compliant format:
-    Put filter values into a list and remove filters with null value.
-    """
-    new_filters = {}
-    if filters is None:
-        logger.warning(
-            "Request with deprecated filter format ('\"filters\": null'). "
-            "Remove empty filters from params to be compliant with future versions"
-        )
-    else:
-        for key, values in filters.items():
-            if values is None:
-                logger.warning(
-                    "Request with deprecated filter format ('%s: null'). "
-                    "Remove null values from filters to be compliant with future versions",
-                    key,
-                )
-                continue
-
-            if not isinstance(values, list):
-                logger.warning(
-                    "Request with deprecated filter format ('%s': %s). "
-                    "Change to '%s':[%s]' to be compliant with future versions",
-                    key,
-                    values,
-                    key,
-                    values,
-                )
-                values = [values]
-
-            new_filters[key] = values
-    return new_filters
diff --git a/rest_api/test/test_rest_api.py b/rest_api/test/test_rest_api.py
index 3a9680965..e96e9eb75 100644
--- a/rest_api/test/test_rest_api.py
+++ b/rest_api/test/test_rest_api.py
@@ -358,19 +358,6 @@ def test_query_with_filter_list(client):
         mocked_pipeline.run.assert_called_with(query=TEST_QUERY, params=params, debug=False)
 
 
-def test_query_with_deprecated_filter_format(client):
-    request_params = {"TestRetriever": {"filters": {"test_key": "i_should_be_a_list"}}}
-    expected_params = {"TestRetriever": {"filters": {"test_key": ["i_should_be_a_list"]}}}
-    with mock.patch("rest_api.controller.search.query_pipeline") as mocked_pipeline:
-        # `run` must return a dictionary containing a `query` key
-        mocked_pipeline.run.return_value = {"query": TEST_QUERY}
-        response = client.post(url="/query", json={"query": TEST_QUERY, "params": request_params})
-        assert 200 == response.status_code
-        # Ensure `run` was called with the expected parameters. In this case,
-        # `_format_filters` will fix the `filters` format within the params
-        mocked_pipeline.run.assert_called_with(query=TEST_QUERY, params=expected_params, debug=False)
-
-
 def test_query_with_no_documents_and_no_answers(client):
     with mock.patch("rest_api.controller.search.query_pipeline") as mocked_pipeline:
         # `run` must return a dictionary containing a `query` key