diff --git a/modules/features/trustee/datamodelFeatureTrustee.py b/modules/features/trustee/datamodelFeatureTrustee.py
index ccb5a407..d1b35718 100644
--- a/modules/features/trustee/datamodelFeatureTrustee.py
+++ b/modules/features/trustee/datamodelFeatureTrustee.py
@@ -268,6 +268,18 @@ class TrusteeDocument(PowerOnModel):
     - The feature instance IS the organisation
     - Contracts are eliminated from the model
     """
+    sysCreatedAt: Optional[float] = Field(
+        default=None,
+        description="Record creation timestamp (UTC, set by system)",
+        json_schema_extra={
+            "label": "Erstellt am",
+            "frontend_type": "timestamp",
+            "frontend_readonly": True,
+            "frontend_required": False,
+            "frontend_visible": True,
+            "system": True,
+        },
+    )
     id: str = Field(
         default_factory=lambda: str(uuid.uuid4()),
         description="Unique document ID",
@@ -380,6 +392,18 @@ class TrusteePosition(PowerOnModel):
     A position can have up to two document references: documentId (Beleg) and bankDocumentId (Bank-Referenz).
     One document (e.g. bank statement) can generate many positions.
     """
+    sysCreatedAt: Optional[float] = Field(
+        default=None,
+        description="Record creation timestamp (UTC, set by system)",
+        json_schema_extra={
+            "label": "Erstellt am",
+            "frontend_type": "timestamp",
+            "frontend_readonly": True,
+            "frontend_required": False,
+            "frontend_visible": True,
+            "system": True,
+        },
+    )
     id: str = Field(
         default_factory=lambda: str(uuid.uuid4()),
         description="Unique position ID",