diff --git a/src/api/CHANGELOG.md b/src/api/CHANGELOG.md
index 71dccdb2..9002e6f4 100644
--- a/src/api/CHANGELOG.md
+++ b/src/api/CHANGELOG.md
@@ -25,6 +25,7 @@ and this project adheres to
 - Decrease the number of database queries for dynamic endpoints
 - Cache the "get PointDeCharge id from its `id_pdc_itinerance`" database query
 - Improve JSON string parsing using pyarrow engine
+- Add default values for optional Statique model fields
 - Upgrade pydantic to `2.10.4`
 - Upgrade pydantic-settings to `2.7.1`
 - Upgrade python-multipart to `0.0.20`
diff --git a/src/api/qualicharge/models/static.py b/src/api/qualicharge/models/static.py
index ecaecb36..70f85983 100644
--- a/src/api/qualicharge/models/static.py
+++ b/src/api/qualicharge/models/static.py
@@ -120,11 +120,17 @@ def not_future(value: date):
 # A date not in the future (today or in the past)
 NotFutureDate = Annotated[date, AfterValidator(not_future)]
 
+# Default values (if not provided)
+DEFAULT_CHAR_VALUE: str = "NA"
+DEFAULT_EMAIL_ADDRESS: str = "na@example.org"
+DEFAULT_PHONE_NUMBER: FrenchPhoneNumber = FrenchPhoneNumber("+33.123456789")
+DEFAULT_SIREN_NUMBER: str = "123456789"
+
 
 class Statique(ModelSchemaMixin, BaseModel):
     """IRVE static model."""
 
-    nom_amenageur: Optional[str]
+    nom_amenageur: Optional[str] = DEFAULT_CHAR_VALUE
     siren_amenageur: Optional[
         Annotated[
             str,
@@ -135,11 +141,11 @@ class Statique(ModelSchemaMixin, BaseModel):
                 ],
             ),
         ]
-    ]
-    contact_amenageur: Optional[EmailStr]
-    nom_operateur: Optional[str]
+    ] = DEFAULT_SIREN_NUMBER
+    contact_amenageur: Optional[EmailStr] = DEFAULT_EMAIL_ADDRESS
+    nom_operateur: Optional[str] = DEFAULT_CHAR_VALUE
     contact_operateur: EmailStr
-    telephone_operateur: Optional[FrenchPhoneNumber]
+    telephone_operateur: Optional[FrenchPhoneNumber] = DEFAULT_PHONE_NUMBER
     nom_enseigne: str
     id_station_itinerance: Annotated[
         str, Field(pattern="(?:(?:^|,)(^[A-Z]{2}[A-Z0-9]{4,33}$|Non concerné))+$")
diff --git a/src/api/qualicharge/schemas/sql.py b/src/api/qualicharge/schemas/sql.py
index 674669de..222aa18a 100644
--- a/src/api/qualicharge/schemas/sql.py
+++ b/src/api/qualicharge/schemas/sql.py
@@ -18,7 +18,7 @@
 from typing_extensions import Optional
 
 from ..exceptions import ObjectDoesNotExist, ProgrammingError
-from ..models.static import Statique
+from ..models.static import DEFAULT_CHAR_VALUE, Statique
 from . import BaseTimestampedSQLModel
 from .core import (
     AccessibilitePMREnum,
diff --git a/src/api/tests/api/v1/routers/test_statique.py b/src/api/tests/api/v1/routers/test_statique.py
index c3c83180..d2db3b77 100644
--- a/src/api/tests/api/v1/routers/test_statique.py
+++ b/src/api/tests/api/v1/routers/test_statique.py
@@ -16,6 +16,7 @@
 from qualicharge.auth.schemas import GroupOperationalUnit, ScopesEnum, User, UserGroup
 from qualicharge.conf import settings
 from qualicharge.factories.static import StatiqueFactory
+from qualicharge.models.static import Statique
 from qualicharge.schemas.core import (
     OperationalUnit,
     PointDeCharge,
@@ -383,6 +384,43 @@ def test_create_for_superuser(client_auth):
     assert json_response["items"][0] == id_pdc_itinerance
 
 
+def test_create_without_optional_fields(client_auth):
+    """Test the /statique/ create endpoint when optional fields are not provided."""
+    id_pdc_itinerance = "FR911E1111ER1"
+    data = Statique(
+        **StatiqueFactory.build(
+            id_pdc_itinerance=id_pdc_itinerance,
+        ).model_dump(
+            exclude={
+                "nom_amenageur",
+                "siren_amenageur",
+                "contact_amenageur",
+                "nom_operateur",
+                "telephone_operateur",
+            }
+        )
+    )
+
+    # Create the Statique without optional fields
+    response = client_auth.post("/statique/", json=json.loads(data.model_dump_json()))
+    assert response.status_code == status.HTTP_201_CREATED
+    json_response = response.json()
+    assert json_response["message"] == "Statique items created"
+    assert json_response["size"] == 1
+    assert json_response["items"][0] == id_pdc_itinerance
+
+    # Get created Statique and check defaults
+    response = client_auth.get(f"/statique/{id_pdc_itinerance}")
+    assert response.status_code == status.HTTP_200_OK
+    json_response = response.json()
+    statique = Statique(**json_response)
+    assert statique.nom_amenageur == "NA"
+    assert statique.siren_amenageur == "123456789"
+    assert statique.contact_amenageur == "na@example.org"
+    assert statique.nom_operateur == "NA"
+    assert statique.telephone_operateur == "tel:+33-1-23-45-67-89"
+
+
 def test_create_twice(client_auth):
     """Test the /statique/ create endpoint with the same payload twice."""
     id_pdc_itinerance = "FR911E1111ER1"
diff --git a/src/api/tests/models/test_static.py b/src/api/tests/models/test_static.py
index bc2cf8ea..f4164f6a 100644
--- a/src/api/tests/models/test_static.py
+++ b/src/api/tests/models/test_static.py
@@ -123,3 +123,25 @@ def test_statique_model_date_maj():
     tomorrow = today + timedelta(days=1)
     with pytest.raises(ValueError, match=f"{tomorrow} is in the future"):
         StatiqueFactory.build(date_maj=tomorrow)
+
+
+def test_statique_model_defaults():
+    """Test the Statique model defaut values (when not provided)."""
+    example = StatiqueFactory.build()
+    statique = Statique(
+        **example.model_dump(
+            exclude={
+                "nom_amenageur",
+                "siren_amenageur",
+                "contact_amenageur",
+                "nom_operateur",
+                "telephone_operateur",
+            }
+        )
+    )
+
+    assert statique.nom_amenageur == "NA"
+    assert statique.siren_amenageur == "123456789"
+    assert statique.contact_amenageur == "na@example.org"
+    assert statique.nom_operateur == "NA"
+    assert statique.telephone_operateur == "+33.123456789"