diff --git a/src/Regula.DocumentReader.WebClient/Model/Ext/Autheticity/AuthenticityResult.cs b/src/Regula.DocumentReader.WebClient/Model/Ext/Autheticity/AuthenticityResult.cs
index 4dbca9d..3837d5e 100644
--- a/src/Regula.DocumentReader.WebClient/Model/Ext/Autheticity/AuthenticityResult.cs
+++ b/src/Regula.DocumentReader.WebClient/Model/Ext/Autheticity/AuthenticityResult.cs
@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Linq;
 
 namespace Regula.DocumentReader.WebClient.Model.Ext.Autheticity
 {
@@ -19,8 +20,11 @@ public AuthenticityCheckResult Payload()
         public List<T> Items()
         {
             var ls = this.authenticityCheckResult.List;
-
-            return ls as List<T>;
+            if (ls is List<AuthenticityCheckResultItem> items)
+            {
+                return items.OfType<T>().ToList();
+            }
+            return new List<T>();
         }        
     }
 }
diff --git a/src/Regula.DocumentReader.WebClient/Model/Ext/Autheticity/Autheticity.cs b/src/Regula.DocumentReader.WebClient/Model/Ext/Autheticity/Autheticity.cs
index c2bda07..170a2c7 100644
--- a/src/Regula.DocumentReader.WebClient/Model/Ext/Autheticity/Autheticity.cs
+++ b/src/Regula.DocumentReader.WebClient/Model/Ext/Autheticity/Autheticity.cs
@@ -1,4 +1,5 @@
-using System.Linq;
+using System;
+using System.Linq;
 
 namespace Regula.DocumentReader.WebClient.Model.Ext.Autheticity
 {
@@ -10,9 +11,9 @@ public static SecurityFeatureChecks UvLuminescenceChecks(this AuthenticityCheckL
             return auth.securityFeatureOrNull(AuthenticityResultType.UV_LUMINESCENCE);
         }
         
-        public static SecurityFeatureChecks LivenessChecks(this AuthenticityCheckList auth)
+        public static IdentChecks LivenessChecks(this AuthenticityCheckList auth)
         {
-            return auth.securityFeatureOrNull(AuthenticityResultType.LIVENESS);
+            return auth.identOrNull(AuthenticityResultType.LIVENESS);
         }
 
         public static SecurityFeatureChecks IrB900Checks(this AuthenticityCheckList auth)