diff --git a/trackintel/io/file.py b/trackintel/io/file.py
index f444527..44df4d5 100644
--- a/trackintel/io/file.py
+++ b/trackintel/io/file.py
@@ -116,10 +116,21 @@ def write_positionfixes_csv(positionfixes, filename, *args, **kwargs):
     filename : str
         The file to write to.
 
+    *args : tuple
+        Positional arguments to pass to pandas to_csv function.
+
+    **kwargs : dict
+        Keyword arguments to pass to pandas to_csv function.
+
     Notes
     -----
     "longitude" and "latitude" is extracted from the geometry column and the orignal
     geometry column is dropped.
+
+    Examples
+    --------
+    >>> trackintel.write_positionfixes_csv(positionfixes, 'data.csv')
+    >>> trackintel.write_positionfixes_csv(positionfixes, 'data.csv', sep=';')
     """
     gdf = positionfixes.copy()
     gdf["longitude"] = positionfixes.geometry.apply(lambda p: p.coords[0][0])
@@ -219,6 +230,17 @@ def write_triplegs_csv(triplegs, filename, *args, **kwargs):
 
     filename : str
         The file to write to.
+
+    *args : tuple
+        Positional arguments to pass to pandas to_csv function.
+
+    **kwargs : dict
+        Keyword arguments to pass to pandas to_csv function.
+
+    Examples
+    --------
+    >>> trackintel.write_triplegs_csv(triplegs, 'data.csv')
+    >>> trackintel.write_triplegs_csv(triplegs, 'data.csv', sep='|')
     """
     geo_col_name = triplegs.geometry.name
     df = pd.DataFrame(triplegs, copy=True)
@@ -317,6 +339,17 @@ def write_staypoints_csv(staypoints, filename, *args, **kwargs):
 
     filename : str
         The file to write to.
+
+    *args : tuple
+        Positional arguments to pass to pandas to_csv function.
+
+    **kwargs : dict
+        Keyword arguments to pass to pandas to_csv function.
+
+    Examples
+    --------
+    >>> trackintel.write_staypoints_csv(staypoints, 'data.csv')
+    >>> trackintel.write_staypoints_csv(staypoints, 'data.csv', sep='\t')
     """
     geo_col_name = staypoints.geometry.name
     df = pd.DataFrame(staypoints, copy=True)
@@ -404,6 +437,17 @@ def write_locations_csv(locations, filename, *args, **kwargs):
 
     filename : str
         The file to write to.
+
+    *args : tuple
+        Positional arguments to pass to pandas to_csv function.
+
+    **kwargs : dict
+        Keyword arguments to pass to pandas to_csv function.
+
+    Examples
+    --------
+    >>> trackintel.write_locations_csv(locations, 'data.csv')
+    >>> trackintel.write_locations_csv(locations, 'data.csv', sep=',', index=False)
     """
     df = pd.DataFrame(locations, copy=True)
     df["center"] = locations["center"].apply(wkt.dumps)
@@ -502,6 +546,17 @@ def write_trips_csv(trips, filename, *args, **kwargs):
 
     filename : str
         The file to write to.
+
+    *args : tuple
+        Positional arguments to pass to pandas to_csv function.
+
+    **kwargs : dict
+        Keyword arguments to pass to pandas to_csv function.
+
+    Examples
+    --------
+    >>> trackintel.write_trips_csv(trips, 'data.csv')
+    >>> trackintel.write_trips_csv(trips, 'data.csv', header=False)
     """
     df = trips.copy()
     if isinstance(df, GeoDataFrame):
@@ -571,6 +626,17 @@ def write_tours_csv(tours, filename, *args, **kwargs):
 
     filename : str
         The file to write to.
+
+    *args : tuple
+        Positional arguments to pass to pandas to_csv function.
+
+    **kwargs : dict
+        Keyword arguments to pass to pandas to_csv function.
+
+    Examples
+    --------
+    >>> trackintel.write_tours_csv(tours, 'data.csv')
+    >>> trackintel.write_tours_csv(tours, 'data.csv', columns=['user_id', 'started_at'])
     """
     tours.to_csv(filename, index=True, *args, **kwargs)