diff --git a/EnvelopeGenerator.Domain/Exceptions/AuthorizationException.cs b/EnvelopeGenerator.Domain/Exceptions/AuthorizationException.cs
new file mode 100644
index 00000000..e610d452
--- /dev/null
+++ b/EnvelopeGenerator.Domain/Exceptions/AuthorizationException.cs
@@ -0,0 +1,17 @@
+#if NETFRAMEWORK
+using System;
+#endif
+
+namespace EnvelopeGenerator.Domain.Exceptions
+{
+    public class AuthorizationException : Exception
+    {
+        public AuthorizationException(string message) : base(message)
+        {
+        }
+
+        public AuthorizationException()
+        {
+        }
+    }
+}
diff --git a/EnvelopeGenerator.Domain/Exceptions/DataIntegrityException.cs b/EnvelopeGenerator.Domain/Exceptions/DataIntegrityException.cs
index 0974286d..4b633d0c 100644
--- a/EnvelopeGenerator.Domain/Exceptions/DataIntegrityException.cs
+++ b/EnvelopeGenerator.Domain/Exceptions/DataIntegrityException.cs
@@ -9,5 +9,9 @@ namespace EnvelopeGenerator.Domain.Exceptions
         public DataIntegrityException(string message) : base(message)
         {
         }
+
+        public DataIntegrityException() : base()
+        {
+        }
     }
 }
diff --git a/EnvelopeGenerator.Server/EnvelopeGenerator.Server/Middleware/ExceptionHandlingMiddleware.cs b/EnvelopeGenerator.Server/EnvelopeGenerator.Server/Middleware/ExceptionHandlingMiddleware.cs
index e14ecb68..b9592e72 100644
--- a/EnvelopeGenerator.Server/EnvelopeGenerator.Server/Middleware/ExceptionHandlingMiddleware.cs
+++ b/EnvelopeGenerator.Server/EnvelopeGenerator.Server/Middleware/ExceptionHandlingMiddleware.cs
@@ -1,6 +1,7 @@
 namespace EnvelopeGenerator.Server.Middleware;
 
 using DigitalData.Core.Exceptions;
+using EnvelopeGenerator.Domain.Exceptions;
 using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Logging;
 using System.Net;
@@ -74,6 +75,16 @@ public class ExceptionHandlingMiddleware
                 message = forbiddenEx.Message;
                 break;
 
+            case AuthorizationException authorizationEx:
+                context.Response.StatusCode = (int)HttpStatusCode.Forbidden;
+                message = authorizationEx.Message;
+                break;
+
+            case DataIntegrityException dataIntegrityEx:
+                context.Response.StatusCode = (int)HttpStatusCode.Conflict;
+                message = dataIntegrityEx.Message;
+                break;
+
             default:
                 logger.LogError(exception, "Unhandled exception occurred.");
                 context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;