diff --git a/app/Exceptions/ExceptionInterface.php b/app/Exceptions/ExceptionInterface.php
new file mode 100644
index 000000000..15ce0eee2
--- /dev/null
+++ b/app/Exceptions/ExceptionInterface.php
@@ -0,0 +1,22 @@
+<?php
+
+/*
+ * This file is part of Cachet.
+ *
+ * (c) Alt Three Services Limited
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace CachetHQ\Cachet\Exceptions;
+
+/**
+ * This is the exception interface.
+ *
+ * @author Graham Campbell <graham@alt-three.com>
+ */
+interface ExceptionInterface
+{
+    //
+}
diff --git a/app/Exceptions/Transformers/ModelNotFoundTransformer.php b/app/Exceptions/Transformers/ExceptionTransformer.php
similarity index 63%
rename from app/Exceptions/Transformers/ModelNotFoundTransformer.php
rename to app/Exceptions/Transformers/ExceptionTransformer.php
index 69ea37ba6..cd8fc267f 100644
--- a/app/Exceptions/Transformers/ModelNotFoundTransformer.php
+++ b/app/Exceptions/Transformers/ExceptionTransformer.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
- * This file is part of Cachet.
+ * This file is part of StyleCI.
  *
  * (c) Alt Three Services Limited
  *
@@ -11,17 +11,19 @@
 
 namespace CachetHQ\Cachet\Exceptions\Transformers;
 
+use CachetHQ\Cachet\Exceptions\ExceptionInterface;
 use Exception;
 use GrahamCampbell\Exceptions\Transformers\TransformerInterface;
 use Illuminate\Database\Eloquent\ModelNotFoundException;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 /**
- * This is the model not found transformer class.
+ * This is the exception transformer class.
  *
  * @author Graham Campbell <graham@alt-three.com>
  */
-class ModelNotFoundTransformer implements TransformerInterface
+class ExceptionTransformer implements TransformerInterface
 {
     /**
      * Transform the provided exception.
@@ -32,8 +34,10 @@ class ModelNotFoundTransformer implements TransformerInterface
      */
     public function transform(Exception $exception)
     {
-        if ($exception instanceof ModelNotFoundException) {
-            $exception = new NotFoundHttpException('Resource not found');
+        if ($exception instanceof ExceptionInterface) {
+            $exception = new BadRequestHttpException($exception->getMessage());
+        } elseif ($exception instanceof ModelNotFoundException) {
+            $exception = new NotFoundHttpException('Resource not found.');
         }
 
         return $exception;
diff --git a/config/exceptions.php b/config/exceptions.php
index 06dcaffef..11064dd63 100644
--- a/config/exceptions.php
+++ b/config/exceptions.php
@@ -27,7 +27,7 @@ return [
 
     'transformers' => [
         'GrahamCampbell\Exceptions\Transformers\CsrfTransformer',
-        'CachetHQ\Cachet\Exceptions\Transformers\ModelNotFoundTransformer',
+        'CachetHQ\Cachet\Exceptions\Transformers\ExceptionTransformer',
     ],
 
     /*