diff --git a/Rdmp.Core/Curation/Data/IRedactedCHI.cs b/Rdmp.Core/Curation/Data/IRedactedCHI.cs
index d1688de1ff..cb76840707 100644
--- a/Rdmp.Core/Curation/Data/IRedactedCHI.cs
+++ b/Rdmp.Core/Curation/Data/IRedactedCHI.cs
@@ -1,4 +1,9 @@
-using FAnsi.Naming;
+// Copyright (c) The University of Dundee 2018-2023
+// This file is part of the Research Data Management Platform (RDMP).
+// RDMP is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+// RDMP is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+// You should have received a copy of the GNU General Public License along with RDMP. If not, see <https://www.gnu.org/licenses/>.
+using FAnsi.Naming;
 using Rdmp.Core.Curation.Data.Cohort;
 using Rdmp.Core.MapsDirectlyToDatabaseTable;
 using Rdmp.Core.Repositories;
@@ -11,6 +16,9 @@
 
 namespace Rdmp.Core.Curation.Data;
 
+/// <summary>
+/// This class stores the redacted CHIs that are found during data load of via catalogue mutilation
+/// </summary>
 public interface IRedactedCHI :IMapsDirectlyToDatabaseTable
 {
 
diff --git a/Rdmp.Core/Curation/Data/RedactedCHI.cs b/Rdmp.Core/Curation/Data/RedactedCHI.cs
index 47cf1d2492..dbf097fbfc 100644
--- a/Rdmp.Core/Curation/Data/RedactedCHI.cs
+++ b/Rdmp.Core/Curation/Data/RedactedCHI.cs
@@ -23,6 +23,8 @@
 
 namespace Rdmp.Core.Curation.Data;
 
+/// <inheritdoc cref="IRedactedCHI"/>
+
 public class RedactedCHI : DatabaseEntity, IRedactedCHI
 {
     private string _potentialCHI;