diff --git a/test/test_transforms_v2.py b/test/test_transforms_v2.py
index 1030032b980..06d6514770d 100644
--- a/test/test_transforms_v2.py
+++ b/test/test_transforms_v2.py
@@ -5526,7 +5526,7 @@ def test_correctness_image(self, mean, std, dtype, fn):
 
 class TestClampBoundingBoxes:
     @pytest.mark.parametrize("format", list(tv_tensors.BoundingBoxFormat))
-    @pytest.mark.parametrize("clamping_mode", ("hard", None))  # TODOBB add soft
+    @pytest.mark.parametrize("clamping_mode", ("soft", "hard", None))
     @pytest.mark.parametrize("dtype", [torch.int64, torch.float32])
     @pytest.mark.parametrize("device", cpu_and_cuda())
     def test_kernel(self, format, clamping_mode, dtype, device):
@@ -5542,7 +5542,7 @@ def test_kernel(self, format, clamping_mode, dtype, device):
         )
 
     @pytest.mark.parametrize("format", list(tv_tensors.BoundingBoxFormat))
-    @pytest.mark.parametrize("clamping_mode", ("hard", None))  # TODOBB add soft
+    @pytest.mark.parametrize("clamping_mode", ("soft", "hard", None))
     def test_functional(self, format, clamping_mode):
         check_functional(F.clamp_bounding_boxes, make_bounding_boxes(format=format, clamping_mode=clamping_mode))
 
@@ -5566,12 +5566,17 @@ def test_errors(self):
             ):
                 F.clamp_bounding_boxes(input_tv_tensor, format=format_, canvas_size=canvas_size_)
 
+        with pytest.raises(ValueError, match="clamping_mode must be soft,"):
+            F.clamp_bounding_boxes(input_tv_tensor, clamping_mode="bad")
+        with pytest.raises(ValueError, match="clamping_mode must be soft,"):
+            transforms.ClampBoundingBoxes(clamping_mode="bad")(input_tv_tensor)
+
     def test_transform(self):
         check_transform(transforms.ClampBoundingBoxes(), make_bounding_boxes())
 
     @pytest.mark.parametrize("rotated", (True, False))
-    @pytest.mark.parametrize("constructor_clamping_mode", ("hard", None))
-    @pytest.mark.parametrize("clamping_mode", ("hard", None, "auto"))  # TODOBB add soft here.
+    @pytest.mark.parametrize("constructor_clamping_mode", ("soft", "hard", None))
+    @pytest.mark.parametrize("clamping_mode", ("soft", "hard", None, "auto"))
     @pytest.mark.parametrize("pass_pure_tensor", (True, False))
     @pytest.mark.parametrize("fn", [F.clamp_bounding_boxes, transform_cls_to_functional(transforms.ClampBoundingBoxes)])
     def test_clamping_mode(self, rotated, constructor_clamping_mode, clamping_mode, pass_pure_tensor, fn):
@@ -5624,8 +5629,8 @@ def test_clamping_mode(self, rotated, constructor_clamping_mode, clamping_mode,
 
 class TestSetClampingMode:
     @pytest.mark.parametrize("format", list(tv_tensors.BoundingBoxFormat))
-    @pytest.mark.parametrize("constructor_clamping_mode", ("hard", None))  # TODOBB add soft
-    @pytest.mark.parametrize("desired_clamping_mode", ("hard", None))  # TODOBB add soft
+    @pytest.mark.parametrize("constructor_clamping_mode", ("soft", "hard", None))
+    @pytest.mark.parametrize("desired_clamping_mode", ("soft", "hard", None))
     def test_setter(self, format, constructor_clamping_mode, desired_clamping_mode):
 
         in_boxes = make_bounding_boxes(format=format, clamping_mode=constructor_clamping_mode)
@@ -5635,7 +5640,7 @@ def test_setter(self, format, constructor_clamping_mode, desired_clamping_mode):
         assert out_boxes.clamping_mode == desired_clamping_mode
 
     @pytest.mark.parametrize("format", list(tv_tensors.BoundingBoxFormat))
-    @pytest.mark.parametrize("constructor_clamping_mode", ("hard", None))  # TODOBB add soft
+    @pytest.mark.parametrize("constructor_clamping_mode", ("soft", "hard", None))
     def test_pipeline_no_leak(self, format, constructor_clamping_mode):
         class AssertClampingMode(transforms.Transform):
             def __init__(self, expected_clamping_mode):
@@ -5669,6 +5674,10 @@ def transform(self, inpt, _):
         # ClampBoundingBoxes doesn't set clamping_mode.
         assert out_boxes.clamping_mode is None
 
+    def test_error(self):
+        with pytest.raises(ValueError, match="clamping_mode must be"):
+            transforms.SetClampingMode("bad")
+
 
 class TestClampKeyPoints:
     @pytest.mark.parametrize("dtype", [torch.int64, torch.float32])
diff --git a/test/test_tv_tensors.py b/test/test_tv_tensors.py
index 9fb1b9fd7ec..f9d545eb9c9 100644
--- a/test/test_tv_tensors.py
+++ b/test/test_tv_tensors.py
@@ -432,7 +432,7 @@ def test_return_type_input():
     tv_tensors.set_return_type("tensor")
 
 
-def test_box_clamping_mode_default():
+def test_box_clamping_mode_default_and_error():
     assert (
         tv_tensors.BoundingBoxes([0.0, 0.0, 10.0, 10.0], format="XYXY", canvas_size=(100, 100)).clamping_mode == "soft"
     )
@@ -440,3 +440,6 @@ def test_box_clamping_mode_default():
         tv_tensors.BoundingBoxes([0.0, 0.0, 10.0, 10.0, 0.0], format="XYWHR", canvas_size=(100, 100)).clamping_mode
         == "soft"
     )
+
+    with pytest.raises(ValueError, match="clamping_mode must be"):
+        tv_tensors.BoundingBoxes([0, 0, 10, 10], format="XYXY", canvas_size=(100, 100), clamping_mode="bad")
diff --git a/torchvision/transforms/v2/_meta.py b/torchvision/transforms/v2/_meta.py
index 2b40f21392f..68395b468ba 100644
--- a/torchvision/transforms/v2/_meta.py
+++ b/torchvision/transforms/v2/_meta.py
@@ -34,8 +34,6 @@ class ClampBoundingBoxes(Transform):
 
     """
 
-    # TODOBB consider "auto" to be a Literal, make sur torchscript is still happy
-    # TODOBB validate clamping_mode
     def __init__(self, clamping_mode: Union[CLAMPING_MODE_TYPE, str] = "auto") -> None:
         super().__init__()
         self.clamping_mode = clamping_mode
@@ -63,9 +61,11 @@ class SetClampingMode(Transform):
 
     def __init__(self, clamping_mode: CLAMPING_MODE_TYPE) -> None:
         super().__init__()
-        # TODOBB validate mode
         self.clamping_mode = clamping_mode
 
+        if self.clamping_mode not in (None, "soft", "hard"):
+            raise ValueError(f"clamping_mode must be soft, hard or None, got {clamping_mode}")
+
     _transformed_types = (tv_tensors.BoundingBoxes,)
 
     def transform(self, inpt: tv_tensors.BoundingBoxes, params: dict[str, Any]) -> tv_tensors.BoundingBoxes:
diff --git a/torchvision/transforms/v2/functional/_meta.py b/torchvision/transforms/v2/functional/_meta.py
index 434a0c79b15..6256a288203 100644
--- a/torchvision/transforms/v2/functional/_meta.py
+++ b/torchvision/transforms/v2/functional/_meta.py
@@ -640,6 +640,9 @@ def clamp_bounding_boxes(
     if not torch.jit.is_scripting():
         _log_api_usage_once(clamp_bounding_boxes)
 
+    if clamping_mode is not None and clamping_mode not in ("soft", "hard", "auto"):
+        raise ValueError(f"clamping_mode must be soft, hard, auto or None, got {clamping_mode}")
+
     if torch.jit.is_scripting() or is_pure_tensor(inpt):
 
         if format is None or canvas_size is None or (clamping_mode is not None and clamping_mode == "auto"):
diff --git a/torchvision/tv_tensors/_bounding_boxes.py b/torchvision/tv_tensors/_bounding_boxes.py
index e3c1032d0de..e4963192671 100644
--- a/torchvision/tv_tensors/_bounding_boxes.py
+++ b/torchvision/tv_tensors/_bounding_boxes.py
@@ -53,8 +53,7 @@ def is_rotated_bounding_format(format: BoundingBoxFormat | str) -> bool:
         raise ValueError(f"format should be str or BoundingBoxFormat, got {type(format)}")
 
 
-# TODOBB consider making this a Literal instead. Tried briefly and got
-# torchscript errors, leaving to str for now.
+# This should ideally be a Literal, but torchscript fails.
 CLAMPING_MODE_TYPE = Optional[str]
 
 # TODOBB All docs. Add any new API to rst files, add tutorial[s].
@@ -96,12 +95,15 @@ def _wrap(cls, tensor: torch.Tensor, *, format: BoundingBoxFormat | str, canvas_
                 tensor = tensor.unsqueeze(0)
             elif tensor.ndim != 2:
                 raise ValueError(f"Expected a 1D or 2D tensor, got {tensor.ndim}D")
+        if clamping_mode is not None and clamping_mode not in ("hard", "soft"):
+            raise ValueError(f"clamping_mode must be None, hard or soft, got {clamping_mode}.")
+
         if isinstance(format, str):
             format = BoundingBoxFormat[format.upper()]
+
         bounding_boxes = tensor.as_subclass(cls)
         bounding_boxes.format = format
         bounding_boxes.canvas_size = canvas_size
-        # TODOBB validate values
         bounding_boxes.clamping_mode = clamping_mode
         return bounding_boxes