diff --git a/src/Umbraco.Core/Security/UmbracoBackOfficeIdentity.cs b/src/Umbraco.Core/Security/UmbracoBackOfficeIdentity.cs
deleted file mode 100644
index 03d0699a12..0000000000
--- a/src/Umbraco.Core/Security/UmbracoBackOfficeIdentity.cs
+++ /dev/null
@@ -1,16 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Security.Claims;
-
-namespace Umbraco.Core.Security
-{
-
-    /// <summary>
-    /// A custom user identity for the Umbraco backoffice
-    /// </summary>
-    [Serializable]
-    public class UmbracoBackOfficeIdentity : ClaimsIdentity
-    {
-    }
-}
diff --git a/src/Umbraco.Infrastructure/Security/BackOfficeClaimsPrincipalFactory.cs b/src/Umbraco.Infrastructure/Security/BackOfficeClaimsPrincipalFactory.cs
index f3f284fa84..906d15c220 100644
--- a/src/Umbraco.Infrastructure/Security/BackOfficeClaimsPrincipalFactory.cs
+++ b/src/Umbraco.Infrastructure/Security/BackOfficeClaimsPrincipalFactory.cs
@@ -26,7 +26,7 @@ namespace Umbraco.Core.Security
 
         /// <inheritdoc />
         /// <remarks>
-        /// Returns a custom <see cref="UmbracoBackOfficeIdentity"/> and allows flowing claims from the external identity
+        /// Returns a ClaimsIdentity that has the required claims, and allows flowing of claims from external identity
         /// </remarks>
         public override async Task<ClaimsPrincipal> CreateAsync(BackOfficeIdentityUser user)
         {
diff --git a/src/Umbraco.Tests/TestHelpers/ControllerTesting/TestControllerActivatorBase.cs b/src/Umbraco.Tests/TestHelpers/ControllerTesting/TestControllerActivatorBase.cs
index 3e9add3b89..18115b9dc9 100644
--- a/src/Umbraco.Tests/TestHelpers/ControllerTesting/TestControllerActivatorBase.cs
+++ b/src/Umbraco.Tests/TestHelpers/ControllerTesting/TestControllerActivatorBase.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Net.Http;
+using System.Security.Claims;
 using System.Web;
 using System.Web.Http;
 using System.Web.Http.Controllers;
@@ -93,7 +94,7 @@ namespace Umbraco.Tests.TestHelpers.ControllerTesting
             //chuck it into the props since this is what MS does when hosted and it's needed there
             request.Properties["MS_HttpContext"] = httpContext;
 
-            var backofficeIdentity = (UmbracoBackOfficeIdentity) owinContext.Authentication.User.Identity;
+            var backofficeIdentity = (ClaimsIdentity) owinContext.Authentication.User.Identity;
 
             var backofficeSecurity = new Mock<IBackOfficeSecurity>();
 
diff --git a/src/Umbraco.Web.BackOffice/Filters/CheckIfUserTicketDataIsStaleAttribute.cs b/src/Umbraco.Web.BackOffice/Filters/CheckIfUserTicketDataIsStaleAttribute.cs
index db3da94eb1..88182464e0 100644
--- a/src/Umbraco.Web.BackOffice/Filters/CheckIfUserTicketDataIsStaleAttribute.cs
+++ b/src/Umbraco.Web.BackOffice/Filters/CheckIfUserTicketDataIsStaleAttribute.cs
@@ -112,7 +112,7 @@ namespace Umbraco.Web.BackOffice.Filters
                         return;
                     }
 
-                    var identity = actionContext.HttpContext.User.Identity as UmbracoBackOfficeIdentity;
+                    var identity = actionContext.HttpContext.User.Identity as ClaimsIdentity;
                     if (identity == null)
                     {
                         return;
diff --git a/src/Umbraco.Web.BackOffice/Security/BackOfficeSecureDataFormat.cs b/src/Umbraco.Web.BackOffice/Security/BackOfficeSecureDataFormat.cs
index c16430097f..0e12a173f7 100644
--- a/src/Umbraco.Web.BackOffice/Security/BackOfficeSecureDataFormat.cs
+++ b/src/Umbraco.Web.BackOffice/Security/BackOfficeSecureDataFormat.cs
@@ -9,7 +9,7 @@ namespace Umbraco.Web.BackOffice.Security
 {
 
     /// <summary>
-    /// Custom secure format that ensures the Identity in the ticket is <see cref="UmbracoBackOfficeIdentity"/> and not just a ClaimsIdentity
+    /// Custom secure format that ensures the Identity in the ticket is verified <see cref="ClaimsIdentity"/>
     /// </summary>
     internal class BackOfficeSecureDataFormat : ISecureDataFormat<AuthenticationTicket>
     {