diff --git a/flow360/component/simulation/validation/validation_simulation_params.py b/flow360/component/simulation/validation/validation_simulation_params.py
index a8e425d62..ffb19bdc7 100644
--- a/flow360/component/simulation/validation/validation_simulation_params.py
+++ b/flow360/component/simulation/validation/validation_simulation_params.py
@@ -33,7 +33,7 @@
     TimeAverageSurfaceOutput,
     VolumeOutput,
 )
-from flow360.component.simulation.primitives import SeedpointVolume
+from flow360.component.simulation.primitives import CustomVolume, SeedpointVolume
 from flow360.component.simulation.time_stepping.time_stepping import Steady, Unsteady
 from flow360.component.simulation.utils import is_exact_instance
 from flow360.component.simulation.validation.validation_context import (
@@ -385,6 +385,7 @@ def _check_complete_boundary_condition_and_unknown_surface(
                     if item.name == "symmetric"
                 ]
 
+    snappy_multizone = False
     potential_zone_zone_interfaces = set()
     if validation_info.farfield_method == "user-defined":
         for zones in volume_zones:
@@ -392,8 +393,12 @@ def _check_complete_boundary_condition_and_unknown_surface(
             if not isinstance(zones, CustomZones):
                 continue
             for custom_volume in zones.entities.stored_entities:
-                for boundary in custom_volume.boundaries.stored_entities:
-                    potential_zone_zone_interfaces.add(boundary.name)
+                if isinstance(custom_volume, CustomVolume):
+                    for boundary in custom_volume.boundaries.stored_entities:
+                        potential_zone_zone_interfaces.add(boundary.name)
+                if isinstance(custom_volume, SeedpointVolume):
+                    ## disable missing boundaries with snappy multizone
+                    snappy_multizone = True
 
     if asset_boundary_entities is None or asset_boundary_entities == []:
         raise ValueError("[Internal] Failed to retrieve asset boundaries")
@@ -427,13 +432,6 @@ def _check_complete_boundary_condition_and_unknown_surface(
     missing_boundaries = asset_boundaries - used_boundaries - potential_zone_zone_interfaces
     unknown_boundaries = used_boundaries - asset_boundaries
 
-    ## disable missing boundaries with snappy multizone
-    snappy_multizone = False
-    for zone in volume_zones:
-        if isinstance(zone, SeedpointVolume):
-            snappy_multizone = True
-            break
-
     if missing_boundaries and not snappy_multizone:
         missing_list = ", ".join(sorted(missing_boundaries))
         raise ValueError(
diff --git a/tests/simulation/params/test_validators_params.py b/tests/simulation/params/test_validators_params.py
index 7a5113f65..f4b2346cc 100644
--- a/tests/simulation/params/test_validators_params.py
+++ b/tests/simulation/params/test_validators_params.py
@@ -2390,3 +2390,60 @@ def test_ghost_surface_pair_requires_quasi_3d_periodic_farfield():
     # Case 4: Farfield method IS "quasi-3d-periodic" → should pass
     with SI_unit_system, ValidationContext(CASE, quasi_3d_periodic_farfield_context):
         Periodic(surface_pairs=(periodic_1, periodic_2), spec=Translational())
+
+
+def test_seedpoint_zone_based_params():
+    from flow360.component.simulation.meshing_param.volume_params import CustomZones
+
+    with SI_unit_system:
+        far_field_zone = SeedpointVolume(
+            point_in_mesh=[32.5231, 112.35123, 32.342] * u.mm, name="fluid"
+        )
+        radiator_zone = SeedpointVolume(
+            point_in_mesh=[3.2341, -1.324535, 23.345211] * u.mm,
+            name="radiator",
+            axes=[(1, 0, 0), (0, 1, 0)],
+        )
+
+        params = SimulationParams(
+            meshing=ModularMeshingWorkflow(
+                surface_meshing=snappy.SurfaceMeshingParams(
+                    defaults=snappy.SurfaceMeshingDefaults(
+                        min_spacing=1 * u.mm, max_spacing=100 * u.mm, gap_resolution=0.01 * u.mm
+                    ),
+                    smooth_controls=snappy.SmoothControls(
+                        lambda_factor=0.7, mu_factor=0, iterations=3
+                    ),
+                ),
+                volume_meshing=VolumeMeshingParams(
+                    defaults=VolumeMeshingDefaults(
+                        boundary_layer_growth_rate=1.2,
+                        boundary_layer_first_layer_thickness=0.01 * u.mm,
+                    ),
+                ),
+                zones=[CustomZones(entities=[far_field_zone, radiator_zone])],
+            ),
+            operating_condition=AerospaceCondition(
+                velocity_magnitude=40 * u.m / u.s,
+            ),
+            time_stepping=Steady(),
+            models=[Wall(surfaces=[Surface(name="face1")])],
+            private_attribute_asset_cache=AssetCache(
+                use_inhouse_mesher=True,
+                project_entity_info=SurfaceMeshEntityInfo(
+                    boundaries=[
+                        Surface(name="face1"),
+                        Surface(name="face2"),
+                    ]
+                ),
+            ),
+        )
+
+    params, errors, _ = validate_model(
+        params_as_dict=params.model_dump(mode="json"),
+        validated_by=ValidationCalledBy.LOCAL,
+        root_item_type="Geometry",
+        validation_level="All",
+    )
+
+    assert errors is None