diff --git a/src/Rest/Common.php b/src/Rest/Common.php
index 9ca18ca..041b570 100644
--- a/src/Rest/Common.php
+++ b/src/Rest/Common.php
@@ -5,7 +5,6 @@
 namespace Dbp\Relay\BlobConnectorCampusonlineDmsBundle\Rest;
 
 use Dbp\Relay\BlobConnectorCampusonlineDmsBundle\Entity\Error;
-use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\HttpFoundation\File\File;
 use Symfony\Component\HttpFoundation\File\UploadedFile;
 use Symfony\Component\HttpFoundation\Request;
@@ -19,29 +18,15 @@ class Common
     public static function getAndValidateUploadedFile(Request $request, string $fileParameterName): File
     {
         $uploadedFile = $request->files->get($fileParameterName);
-        if ($uploadedFile === null) {
-            // look into form parameters if the file was sent in the form of a binary string parameter,
-            // i.e. without the 'filename' directive in the 'content-disposition' header, which CO currently does.
-            $binaryContent = $request->request->get($fileParameterName);
-            if ($binaryContent === null) {
-                throw new Error(Response::HTTP_BAD_REQUEST, 'parameter \'binary_content\' must not be empty',
-                    errorCode: 'REQUIRED_PARAMETER_MISSING', errorDetail: 'binary_content');
-            }
-            $filesystem = new Filesystem();
-            $tempFilePath = $filesystem->tempnam('/tmp', 'php');
-            file_put_contents($tempFilePath, $binaryContent);
-            $uploadedFile = new File($tempFilePath);
-        }
-
         if ($uploadedFile === null) {
             throw new Error(Response::HTTP_BAD_REQUEST, 'Parameter \''.$fileParameterName.'\' is required',
                 errorCode: 'REQUIRED_PARAMETER_MISSING', errorDetail: $fileParameterName);
         }
-        if ($uploadedFile instanceof File === false) {
+        if ($uploadedFile instanceof UploadedFile === false) {
             throw new Error(Response::HTTP_BAD_REQUEST, 'Parameter \''.$fileParameterName.'\' must be a file stream',
                 errorCode: 'PARAMETER_TYPE_INVALID', errorDetail: $fileParameterName);
         }
-        if ($uploadedFile instanceof UploadedFile && $uploadedFile->getError() !== UPLOAD_ERR_OK) {
+        if ($uploadedFile->getError() !== UPLOAD_ERR_OK) {
             throw new Error(Response::HTTP_BAD_REQUEST, sprintf('file stream upload failed: %d', $uploadedFile->getError()),
                 errorCode: 'FILE_UPLOAD_FAILED', errorDetail: $fileParameterName);
         }
diff --git a/src/Rest/CreateDocumentController.php b/src/Rest/CreateDocumentController.php
index 9d885e9..84ca01b 100644
--- a/src/Rest/CreateDocumentController.php
+++ b/src/Rest/CreateDocumentController.php
@@ -52,7 +52,7 @@ public function __invoke(Request $request): Document
             throw new Error(Response::HTTP_BAD_REQUEST, 'The metadata of the document is not valid JSON',
                 errorCode: 'RESOURCE_MALFORMED_MDATA', errorDetail: 'metadata');
         }
-        $documentType = $request->request->get('documentType');
+        $documentType = $request->request->get('document_type');
 
         $document = new Document();
         $document->setMetaData($metadataArray);