diff --git a/app/commands/helpers/incident_helper.py b/app/commands/helpers/incident_helper.py
index e5522719..4d3bc8a2 100644
--- a/app/commands/helpers/incident_helper.py
+++ b/app/commands/helpers/incident_helper.py
@@ -289,6 +289,15 @@ def close_incident(client, body, ack):
     channel_id = body["channel_id"]
     channel_name = body["channel_name"]
 
+    if not channel_name.startswith("incident-"):
+        user_id = body["user_id"]
+        client.chat_postEphemeral(
+            text=f"Channel {channel_name} is not an incident channel. Please use this command in an incident channel.",
+            channel=channel_id,
+            user=user_id,
+        )
+        return
+
     # get and update the incident document
     document_id = ""
     response = client.bookmarks_list(channel_id=channel_id)
diff --git a/app/tests/commands/helpers/test_incident_helper.py b/app/tests/commands/helpers/test_incident_helper.py
index a0609e63..b2cec252 100644
--- a/app/tests/commands/helpers/test_incident_helper.py
+++ b/app/tests/commands/helpers/test_incident_helper.py
@@ -486,6 +486,35 @@ def test_close_incident_no_bookmarks(
     mock_update_spreadsheet.assert_called_once_with("#2024-01-12-test")
 
 
+# Test that the channel that the command is ran in,  is not an incident channel.
+def test_close_incident_not_incident_channel():
+    mock_client = MagicMock()
+    mock_ack = MagicMock()
+
+    # Mock the response of the private message to have been posted as expected
+    mock_client.chat_postEphemeral.return_value = {"ok": True}
+
+    # Call close_incident
+    incident_helper.close_incident(
+        mock_client,
+        {
+            "channel_id": "C12345",
+            "user_id": "12345",
+            "channel_name": "some-other-channel",
+        },
+        mock_ack,
+    )
+
+    # Assert that ack was called
+    mock_ack.assert_called_once()
+
+    # Assert that the private message was posted as expected with the expected text
+    expected_text = "Channel some-other-channel is not an incident channel. Please use this command in an incident channel."
+    mock_client.chat_postEphemeral.assert_called_once_with(
+        channel="C12345", user="12345", text=expected_text
+    )
+
+
 @patch("commands.helpers.incident_helper.google_drive.close_incident_document")
 @patch(
     "commands.helpers.incident_helper.google_drive.update_spreadsheet_close_incident"