diff --git a/DocumentOperator.API/Middleware/ExceptionHandlingMiddleware.cs b/DocumentOperator.API/Middleware/ExceptionHandlingMiddleware.cs
index 24e1ce8..765bb7f 100644
--- a/DocumentOperator.API/Middleware/ExceptionHandlingMiddleware.cs
+++ b/DocumentOperator.API/Middleware/ExceptionHandlingMiddleware.cs
@@ -1,5 +1,4 @@
 using DocumentOperator.Domain.Common.Exceptions;
-using DocumentOperator.Domain.Exceptions;
 using FluentValidation;
 using Microsoft.AspNetCore.Mvc;
 using System.Net;
@@ -67,7 +66,7 @@ public class ExceptionHandlingMiddleware(RequestDelegate Next)
                 }
             ),
 
-            // Not Found Exception (404 Not Found)
+            // Bad Request Exception (400 Bad Request)
             BadRequestException badReqEx => (
                 HttpStatusCode.BadRequest,
                 new ProblemDetails
@@ -93,19 +92,6 @@ public class ExceptionHandlingMiddleware(RequestDelegate Next)
                 }
             ),
 
-            // Swiss QR Code Not Found Exception (404 Not Found)
-            SwissQrCodeNotFoundException qrNotFoundEx => (
-                HttpStatusCode.NotFound,
-                new ProblemDetails
-                {
-                    Type = "https://datatracker.ietf.org/doc/html/rfc7231#section-6.5.4",
-                    Title = "Swiss QR Code Not Found",
-                    Status = (int)HttpStatusCode.NotFound,
-                    Detail = qrNotFoundEx.Message,
-                    Instance = context.Request.Path
-                }
-            ),
-
             // Generic Exception (500 Internal Server Error)
             _ => (
                 HttpStatusCode.InternalServerError,