diff --git a/CHANGELOG.md b/CHANGELOG.md
index fe6a083b3..966994905 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 ### Changed
+- Modified `add_viadot_metadata_columns` to be able to apply a parameter source_name to the decorator  for to_df funtion or function where the DataFrame is generated.
+- Changed `SharepointToDF` task in order to implement add_viadot_metadata_columns with value `source_name="Sharepoint"` after changes.
 
 ## [0.4.19] - 2023-08-31
 ### Added
diff --git a/viadot/tasks/sharepoint.py b/viadot/tasks/sharepoint.py
index fcceb1dbf..7ba9c4d41 100644
--- a/viadot/tasks/sharepoint.py
+++ b/viadot/tasks/sharepoint.py
@@ -12,6 +12,7 @@
 from ..exceptions import ValidationError
 from ..sources import Sharepoint
 from .azure_key_vault import AzureKeyVaultSecret
+from ..utils import add_viadot_metadata_columns
 
 logger = logging.get_logger()
 
@@ -147,6 +148,7 @@ def split_sheet(
         "sheet_number",
         "validate_excel_file",
     )
+    @add_viadot_metadata_columns(source_name="Sharepoint")
     def run(
         self,
         path_to_file: str = None,
diff --git a/viadot/utils.py b/viadot/utils.py
index 14659c702..2b4c80538 100644
--- a/viadot/utils.py
+++ b/viadot/utils.py
@@ -408,21 +408,44 @@ def check_if_empty_file(
             handle_if_empty_file(if_empty, message=f"Input file - '{path}' is empty.")
 
 
-def add_viadot_metadata_columns(func: Callable) -> Callable:
+def add_viadot_metadata_columns(source_name: str = None) -> Callable:
     """
     Decorator that adds metadata columns to df in 'to_df' method.
     For now only _viadot_source is available because _viadot_downloaded_at_utc is added on the Flow level.
+
+    Args:
+        source_name (str, optional): The name of the source to be included in the DataFrame.
+        This should be provided when creating a DataFrame in a Task, rather than in a Source.
+        Defaults to None.
+
+    Warning: Please remember to include brackets when applying a decorator, even if you are not passing the 'source_name' parameter.
+
+    Example:
+
+        In task:
+
+        @add_viadot_metadata_columns(source_name="Sharepoint")
+        def to_df(self):
+            ...
+
+        In source:
+
+        @add_viadot_metadata_columns()
+        def to_df(self):
+            ...
     """
 
-    @functools.wraps(func)
-    def wrapper(*args, **kwargs) -> pd.DataFrame:
-        df = func(*args, **kwargs)
+    def decorator(func) -> Callable:
+        @functools.wraps(func)
+        def wrapper(*args, **kwargs) -> pd.DataFrame:
+            df = func(*args, **kwargs)
+
+            df["_viadot_source"] = (
+                source_name if source_name is not None else args[0].__class__.__name__
+            )
+
+            return df
 
-        # Accessing instance
-        instance = args[0]
-        _viadot_source = kwargs.get("source_name") or instance.__class__.__name__
-        df["_viadot_source"] = _viadot_source
-        # df["_viadot_downloaded_at_utc"] = datetime.now(timezone.utc).replace(microsecond=0)
-        return df
+        return wrapper
 
-    return wrapper
+    return decorator