diff --git a/SacsStandardBase/Base/Bus/ItemId.cs b/SacsStandardBase/Base/Bus/ItemId.cs
index 6b05a4d..8788380 100644
--- a/SacsStandardBase/Base/Bus/ItemId.cs
+++ b/SacsStandardBase/Base/Bus/ItemId.cs
@@ -48,6 +48,7 @@ namespace Sarand.Net.Standard.Base.Bus
 
 		//-------------------------------------------------------------------
 		// Utilities.
+		/// <summary>Verify that the Item Id is non-null and that the Item Type is specified (>0) and the Id is valid (>0).</summary>
 		public static bool IsValid(ItemId itemId)
 		{
 			if (itemId == null) return false;
@@ -56,6 +57,11 @@ namespace Sarand.Net.Standard.Base.Bus
 			if (itemId.idType == ItemIdType.String && StringUtil.IsEmpty(itemId.StringId)) return false;
 			return true;
 		}
+		/// <summary>Return the Item Id if non-=null, otherwise empty Item Id.</summary>
+		public static ItemId InvalidOnNull (ItemId itemId)
+		{
+			return itemId ?? new ItemId();
+		}
 
 		//-------------------------------------------------------------------
 		// Comparison.