diff --git a/DataCenter_Windows/WindowsDataCenter/Interfaces/IRepository.cs b/DataCenter_Windows/WindowsDataCenter/Interfaces/IRepository.cs
index 30f8141..e5e4f59 100644
--- a/DataCenter_Windows/WindowsDataCenter/Interfaces/IRepository.cs
+++ b/DataCenter_Windows/WindowsDataCenter/Interfaces/IRepository.cs
@@ -66,6 +66,10 @@ namespace Interfaces
         /// <see cref="IdentifierList"/> with nested <see cref="Identifier"/> list
         /// </returns>
         IdentifierList GetUnassignedIdentifierList();
+        /// <summary>
+        /// Remove all unassigned identifiers from the system.
+        /// </summary>
+        void ClearUnassignedIdentifiers();
 
         /// <summary>
         /// Update a user in the system with the new values.