diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7488d5834..e40382bf3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,7 @@
 * Use pytest format for dandi tests to avoid window permission error on teardown [PR #1151](https://github.com/catalystneuro/neuroconv/pull/1151)
 * Added many docstrings for public functions [PR #1063](https://github.com/catalystneuro/neuroconv/pull/1063)
 * Clean up with warnings and deprecations in the testing framework [PR #1158](https://github.com/catalystneuro/neuroconv/pull/1158)
+* Detect mismatch errors between group and group names when writing ElectrodeGroups [PR #1165](https://github.com/catalystneuro/neuroconv/pull/1165)
 
 
 # v0.6.5 (November 1, 2024)
diff --git a/src/neuroconv/tools/spikeinterface/spikeinterface.py b/src/neuroconv/tools/spikeinterface/spikeinterface.py
index d31e6032c..7df25c703 100644
--- a/src/neuroconv/tools/spikeinterface/spikeinterface.py
+++ b/src/neuroconv/tools/spikeinterface/spikeinterface.py
@@ -245,11 +245,19 @@ def _get_group_name(recording: BaseRecording) -> np.ndarray:
         An array containing the group names. If the `group_name` property is not
         available, the channel groups will be returned. If the group names are
         empty, a default value 'ElectrodeGroup' will be used.
+
+    Raises
+    ------
+    ValueError
+        If the number of unique group names doesn't match the number of unique groups,
+        or if the mapping between group names and group numbers is inconsistent.
     """
     default_value = "ElectrodeGroup"
     group_names = recording.get_property("group_name")
+    groups = recording.get_channel_groups()
+
     if group_names is None:
-        group_names = recording.get_channel_groups()
+        group_names = groups
     if group_names is None:
         group_names = np.full(recording.get_num_channels(), fill_value=default_value)
 
@@ -259,6 +267,23 @@ def _get_group_name(recording: BaseRecording) -> np.ndarray:
     # If for any reason the group names are empty, fill them with the default
     group_names[group_names == ""] = default_value
 
+    # Validate group names against groups
+    if groups is not None:
+        unique_groups = set(groups)
+        unique_names = set(group_names)
+
+        if len(unique_names) != len(unique_groups):
+            raise ValueError("The number of group names must match the number of groups")
+
+        # Check consistency of group name to group number mapping
+        group_to_name_map = {}
+        for group, name in zip(groups, group_names):
+            if group in group_to_name_map:
+                if group_to_name_map[group] != name:
+                    raise ValueError("Inconsistent mapping between group numbers and group names")
+            else:
+                group_to_name_map[group] = name
+
     return group_names
 
 
diff --git a/src/neuroconv/tools/testing/mock_interfaces.py b/src/neuroconv/tools/testing/mock_interfaces.py
index 38cc750ab..42bf699df 100644
--- a/src/neuroconv/tools/testing/mock_interfaces.py
+++ b/src/neuroconv/tools/testing/mock_interfaces.py
@@ -220,6 +220,12 @@ def __init__(
             es_key=es_key,
         )
 
+        # Adding this as a safeguard before the spikeinterface changes are merged:
+        # https://github.com/SpikeInterface/spikeinterface/pull/3588
+        channel_ids = self.recording_extractor.get_channel_ids()
+        channel_ids_as_strings = [str(id) for id in channel_ids]
+        self.recording_extractor = self.recording_extractor.rename_channels(new_channel_ids=channel_ids_as_strings)
+
     def get_metadata(self) -> dict:
         """
         Returns the metadata dictionary for the current object.
@@ -272,6 +278,7 @@ def __init__(
         )
 
         # Sorting extractor to have string unit ids until is changed in SpikeInterface
+        # https://github.com/SpikeInterface/spikeinterface/pull/3588
         string_unit_ids = [str(id) for id in self.sorting_extractor.unit_ids]
         self.sorting_extractor = self.sorting_extractor.rename_units(new_unit_ids=string_unit_ids)
 
diff --git a/tests/test_ecephys/test_tools_spikeinterface.py b/tests/test_ecephys/test_tools_spikeinterface.py
index 3436a2e70..68c681f46 100644
--- a/tests/test_ecephys/test_tools_spikeinterface.py
+++ b/tests/test_ecephys/test_tools_spikeinterface.py
@@ -24,6 +24,7 @@
 from neuroconv.tools.nwb_helpers import get_module
 from neuroconv.tools.spikeinterface import (
     add_electrical_series_to_nwbfile,
+    add_electrode_groups_to_nwbfile,
     add_electrodes_to_nwbfile,
     add_recording_to_nwbfile,
     add_sorting_to_nwbfile,
@@ -1071,6 +1072,29 @@ def test_missing_bool_values(self):
         assert np.array_equal(extracted_incomplete_property, expected_incomplete_property)
 
 
+class TestAddElectrodeGroups:
+    def test_group_naming_not_matching_group_number(self):
+        recording = generate_recording(num_channels=4)
+        recording.set_channel_groups(groups=[0, 1, 2, 3])
+        recording.set_property(key="group_name", values=["A", "A", "A", "A"])
+
+        nwbfile = mock_NWBFile()
+        with pytest.raises(ValueError, match="The number of group names must match the number of groups"):
+            add_electrode_groups_to_nwbfile(nwbfile=nwbfile, recording=recording)
+
+    def test_inconsistent_group_name_mapping(self):
+        recording = generate_recording(num_channels=3)
+        # Set up groups where the same group name is used for different group numbers
+        recording.set_channel_groups(groups=[0, 1, 0])
+        recording.set_property(
+            key="group_name", values=["A", "B", "B"]  # Inconsistent: group 0 maps to names "A" and "B"
+        )
+
+        nwbfile = mock_NWBFile()
+        with pytest.raises(ValueError, match="Inconsistent mapping between group numbers and group names"):
+            add_electrode_groups_to_nwbfile(nwbfile=nwbfile, recording=recording)
+
+
 class TestAddUnitsTable(TestCase):
     @classmethod
     def setUpClass(cls):