diff --git a/src/alpine_bits_python/alpinebits_server.py b/src/alpine_bits_python/alpinebits_server.py
index bb3b4a0..f15a232 100644
--- a/src/alpine_bits_python/alpinebits_server.py
+++ b/src/alpine_bits_python/alpinebits_server.py
@@ -505,6 +505,9 @@ class ReadAction(AlpineBitsAction):
 
         start_date = None
 
+        """When given, the server will send only inquiries generated after the Start timestamp, regardless
+ whether the client has retrieved them before or not."""
+
         if hotel_read_request.selection_criteria is not None:
             start_date = datetime.fromisoformat(
                 hotel_read_request.selection_criteria.start
@@ -518,7 +521,8 @@ class ReadAction(AlpineBitsAction):
             .filter(Reservation.hotel_code == hotelid)
         )
         if start_date:
-            stmt = stmt.filter(Reservation.start_date >= start_date)
+            _LOGGER.info("Filtering reservations from start date %s", start_date)
+            stmt = stmt.filter(Reservation.created_at >= start_date)
         # remove reservations that have been acknowledged via client_id
         elif client_info.client_id:
             subquery = (
diff --git a/src/alpine_bits_python/schemas.py b/src/alpine_bits_python/schemas.py
index f29558c..4affec1 100644
--- a/src/alpine_bits_python/schemas.py
+++ b/src/alpine_bits_python/schemas.py
@@ -10,7 +10,7 @@ from XML generation (xsdata) follows clean architecture principles.
 """
 
 import hashlib
-from datetime import date
+from datetime import date, datetime
 from enum import Enum
 
 from pydantic import BaseModel, EmailStr, Field, field_validator, model_validator
@@ -43,6 +43,7 @@ class ReservationData(BaseModel):
     md5_unique_id: str | None = Field(None, min_length=1, max_length=32)
     start_date: date
     end_date: date
+    created_at: datetime = Field(default_factory=datetime.now)
     num_adults: int = Field(..., ge=1)
     num_children: int = Field(0, ge=0, le=10)
     children_ages: list[int] = Field(default_factory=list)