diff --git a/CHANGELOG.md b/CHANGELOG.md
index c6bcde932..df7ca001c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -32,8 +32,8 @@
 - `intelmq.bots.parsers.shadowserver._config`:
   - Fetch schema before first run (PR#2482 by elsif2, fixes #2480).
 - `intelmq.bots.parsers.dataplane.parser`: Use `  |  ` as field delimiter, fix parsing of AS names including `|` (PR#2488 by DigitalTrustCenter).
-- all parsers: add `copy_custom_fields` parameter allowing copying additional fields from the report, e.g. `extra.file_name`.
-  (PR# by Kamil Mankowski).
+- all parsers: add `copy_collector_provided_fields` parameter allowing copying additional fields from the report, e.g. `extra.file_name`.
+  (PR#2513 by Kamil Mankowski).
 
 #### Experts
 - `intelmq.bots.experts.sieve.expert`:
diff --git a/docs/user/bots.md b/docs/user/bots.md
index 351cd0da8..2c8ec6e9d 100644
--- a/docs/user/bots.md
+++ b/docs/user/bots.md
@@ -1357,7 +1357,7 @@ defaults_fields:
   protocol.transport: tcp
 ```
 
-#### `copy_custom_fields`
+#### `copy_collector_provided_fields`
 
 (optional, list) List of additional fields to be copy from the report (only applied if parsing the
 event doesn't set the value).
@@ -1365,7 +1365,7 @@ event doesn't set the value).
 Example usage:
 
 ```yaml
-copy_custom_fields:
+copy_collector_provided_fields:
   - extra.file_name
 ```
 
diff --git a/intelmq/lib/bot.py b/intelmq/lib/bot.py
index dd0696810..49591f9a1 100644
--- a/intelmq/lib/bot.py
+++ b/intelmq/lib/bot.py
@@ -1082,7 +1082,7 @@ class ParserBot(Bot):
     _default_message_type = 'Report'
 
     default_fields: Optional[dict] = {}
-    copy_custom_fields: Optional[list] = []
+    copy_collector_provided_fields: Optional[list] = []
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -1127,6 +1127,11 @@ def _get_io_and_save_line_ending(self, raw: str) -> io.StringIO:
         if not self._line_ending or isinstance(self._line_ending, tuple):
             self._line_ending = '\r\n'
         return data_io
+    
+    def new_event(self, *args, **kwargs):
+        if self.copy_collector_provided_fields:
+            kwargs['copy_collector_provided_fields'] = self.copy_collector_provided_fields
+        return super().new_event(*args, **kwargs)
 
     def parse_csv(self, report: libmessage.Report):
         """
@@ -1246,13 +1251,6 @@ def process(self):
                         for key, value in self.default_fields.items():
                             event.add(key, value, overwrite=False)
 
-                if self.copy_custom_fields:
-                    for key in self.copy_custom_fields:
-                        if key not in report:
-                            continue
-                        for event in events:
-                            event.add(key, report.get(key), overwrite=False)
-
             except Exception:
                 self.logger.exception('Failed to parse line.')
                 self.__failed.append((traceback.format_exc(), self._current_line))
diff --git a/intelmq/lib/message.py b/intelmq/lib/message.py
index e99e22731..603bcd281 100644
--- a/intelmq/lib/message.py
+++ b/intelmq/lib/message.py
@@ -98,7 +98,7 @@ class Message(dict):
     _default_value_set = False
 
     def __init__(self, message: Union[dict, tuple] = (), auto: bool = False,
-                 harmonization: dict = None) -> None:
+                 harmonization: dict = None, **_) -> None:
         try:
             classname = message['__type'].lower()
             del message['__type']
@@ -522,9 +522,13 @@ def __contains__(self, item: str) -> bool:
 
 
 class Event(Message):
-
-    def __init__(self, message: Union[dict, tuple] = (), auto: bool = False,
-                 harmonization: Optional[dict] = None) -> None:
+    def __init__(
+        self,
+        message: Union[dict, tuple] = (),
+        auto: bool = False,
+        harmonization: Optional[dict] = None,
+        copy_collector_provided_fields: Optional[dict] = None,
+    ) -> None:
         """
         Parameters:
             message: Give a report and feed.name, feed.url and
@@ -551,6 +555,12 @@ def __init__(self, message: Union[dict, tuple] = (), auto: bool = False,
                 template['rtir_id'] = message['rtir_id']
             if 'time.observation' in message:
                 template['time.observation'] = message['time.observation']
+            
+            if copy_collector_provided_fields:
+                for key in copy_collector_provided_fields:
+                    if key not in message:
+                        continue
+                    template[key] = message.get(key)
         else:
             template = message
         super().__init__(template, auto, harmonization)
@@ -559,7 +569,7 @@ def __init__(self, message: Union[dict, tuple] = (), auto: bool = False,
 class Report(Message):
 
     def __init__(self, message: Union[dict, tuple] = (), auto: bool = False,
-                 harmonization: Optional[dict] = None) -> None:
+                 harmonization: Optional[dict] = None, **_) -> None:
         """
         Parameters:
             message: Passed along to Message's and dict's init.
diff --git a/intelmq/tests/lib/test_parser_bot.py b/intelmq/tests/lib/test_parser_bot.py
index c1d9faa6d..43b83f71d 100644
--- a/intelmq/tests/lib/test_parser_bot.py
+++ b/intelmq/tests/lib/test_parser_bot.py
@@ -167,12 +167,12 @@ def test_bad_default_fields_parameter_2(self):
         self.assertAnyLoglineEqual(message="Invalid value of key 'source.port' in default_fields parameter.",
                                    levelname="ERROR")
 
-    def test_copy_custom_fields_from_report(self):
+    def test_copy_collector_provided_fields_from_report(self):
         """Allow copying custom fields from the report message to support more context from reports"""
         report = {**EXAMPLE_SHORT, "extra.file_name": "file.txt", "extra.field2": "value2"}
         self.input_message = report
 
-        self.run_bot(parameters={"copy_custom_fields":
+        self.run_bot(parameters={"copy_collector_provided_fields":
                                  ["extra.file_name", "extra.not_exists"]})
 
         output_message = EXAMPLE_EVENT.copy()