diff --git a/src/main/java/ru/soune/nocopy/handler/ComplaintEntityHandler.java b/src/main/java/ru/soune/nocopy/handler/ComplaintEntityHandler.java
index f4b061c..4855ca6 100644
--- a/src/main/java/ru/soune/nocopy/handler/ComplaintEntityHandler.java
+++ b/src/main/java/ru/soune/nocopy/handler/ComplaintEntityHandler.java
@@ -67,7 +67,9 @@ public class ComplaintEntityHandler implements RequestHandler {
                 case "update_status" -> handleUpdateStatus(msgId, complaintRequest);
                 case "update" -> handleUpdate(msgId, complaintRequest);
                 case "delete" -> handleDelete(msgId, complaintRequest);
-                default -> errorResponse(msgId, MessageCode.MSG_ID_NOT_FOUND.getCode(), "Unknown action: " + action);
+                default -> errorResponse(msgId, MessageCode.MSG_ID_NOT_FOUND.getCode(), "Valid actions: " +
+                        List.of("create", "get", "get_all", "get_by_violation", "update_status",
+                                "update", "delete"));
             };
         } catch (Exception e) {
             log.error("Error handling complaint request", e);