diff --git a/DigitalData.Core.DTO/Flag.cs b/DigitalData.Core.DTO/Flag.cs
index bc2508b..cf29a75 100644
--- a/DigitalData.Core.DTO/Flag.cs
+++ b/DigitalData.Core.DTO/Flag.cs
@@ -39,6 +39,12 @@
         /// Indicates that either a possible security breach, a possible data integrity issue, or both have been detected during the service operation.
         /// This flag is used when it is uncertain whether the issue is related to security, data integrity, or both.
         /// </summary>
-        PossibleSecurityBreachOrDataIntegrity
+        PossibleSecurityBreachOrDataIntegrity,
+
+        /// <summary>
+        /// Indicates that the requested resource or operation could not be found.
+        /// This flag is used when the specified item or condition does not exist or is unavailable.
+        /// </summary>
+        NotFound
     }
 }
\ No newline at end of file