diff --git a/pytr/event.py b/pytr/event.py
index a923403..7d2390b 100644
--- a/pytr/event.py
+++ b/pytr/event.py
@@ -743,7 +743,7 @@ def _parse_card_note(event_dict: Dict[Any, Any]) -> Optional[str]:
         Returns:
             Optional[str]: note
         """
-        eventTypeStr = event_dict.get("eventType", "")
+        eventTypeStr = event_dict.get("eventType") or ""
         if eventTypeStr.startswith("card_"):
             return eventTypeStr
 
diff --git a/tests/aktien_erhalten_null_eventType.json b/tests/aktien_erhalten_null_eventType.json
new file mode 100644
index 0000000..62a98c1
--- /dev/null
+++ b/tests/aktien_erhalten_null_eventType.json
@@ -0,0 +1,27 @@
+{
+    "id": "9e81acd0-3fe1-409b-abfd-96f26088eeb0",
+    "timestamp": "2025-03-15T10:00:00.000+0000",
+    "title": "AI & Big Data USD (Acc)",
+    "icon": "logos/IE000716YHJ7/v2",
+    "subtitle": "Aktien erhalten",
+    "eventType": null,
+    "action": {
+        "type": "timelineDetail",
+        "payload": "9e81acd0-3fe1-409b-abfd-96f26088eeb0"
+    },
+    "source": "timelineActivity",
+    "details": {
+        "id": "9e81acd0-3fe1-409b-abfd-96f26088eeb0",
+        "sections": [
+            {
+                "title": "Du hast Aktien erhalten",
+                "data": {
+                    "icon": "logos/IE000716YHJ7/v2",
+                    "timestamp": "2025-03-15T10:00:00.000Z",
+                    "status": "executed"
+                },
+                "type": "header"
+            }
+        ]
+    }
+}
diff --git a/tests/test_events.py b/tests/test_events.py
index 1bd47a8..d7de399 100644
--- a/tests/test_events.py
+++ b/tests/test_events.py
@@ -2005,6 +2005,9 @@ def test_events():
                 }
             ],
         },
+        {
+            "filename": "aktien_erhalten_null_eventType.json",
+        },
     ]
 
     # Create an instance of EventCsvFormatter
@@ -2053,3 +2056,10 @@ def test_events():
             entry.setdefault("ISIN2", None)
             entry.setdefault("Stück2", None)
         assert transactions == rowtransactions
+
+
+def test_parse_card_note_returns_none_when_event_type_is_null():
+    """Regression for #350."""
+    assert Event._parse_card_note({"eventType": None}) is None
+    assert Event._parse_card_note({}) is None
+    assert Event._parse_card_note({"eventType": "card_refund"}) == "card_refund"