diff --git a/config/packages/workflow.yaml b/config/packages/workflow.yaml
index bacf49d..f89b573 100644
--- a/config/packages/workflow.yaml
+++ b/config/packages/workflow.yaml
@@ -22,12 +22,18 @@ framework:
                 confirm_contract:
                     from: checking_contract
                     to: confirmed
+                reject_contract:
+                    from: checking_contract
+                    to: new
                 upload_invoice:
                     from: confirmed
                     to: checking_invoice
                 confirm_invoice:
                     from: checking_invoice
                     to: paid
+                reject_invoice:
+                    from: checking_invoice
+                    to: confirmed
                 complete:
                     from: confirmed
                     to: completed
diff --git a/src/Controller/Admin/Document/CheckController.php b/src/Controller/Admin/Document/CheckController.php
new file mode 100644
index 0000000..264eb3b
--- /dev/null
+++ b/src/Controller/Admin/Document/CheckController.php
@@ -0,0 +1,107 @@
+<?php
+
+namespace App\Controller\Admin\Document;
+
+use App\Entity\Upload;
+use App\Event\DocumentRejectedEvent;
+use App\Form\DocumentCheckType;
+use App\Model\AjaxModalResponseDto;
+use App\Model\DocumentCheckDto;
+use Doctrine\ORM\EntityManagerInterface;
+use Psr\Log\LoggerInterface;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\DependencyInjection\Attribute\Target;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Routing\Annotation\Route;
+use Symfony\Component\Security\Http\Attribute\IsGranted;
+use Symfony\Component\Workflow\WorkflowInterface;
+use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
+
+class CheckController extends AbstractController
+{
+    public function __construct(
+        private readonly EntityManagerInterface $entityManager,
+        #[Target('disposition')]
+        private readonly WorkflowInterface $workflow,
+        private readonly EventDispatcherInterface $eventDispatcher,
+        private readonly LoggerInterface $logger
+    ) {
+    }
+
+    #[Route('/admin/document/check/{uuid}', name: 'app_admin_document_check')]
+    #[IsGranted('ROLE_ADMINISTRATIVE')]
+    public function index(Upload $document, Request $request): JsonResponse
+    {
+        $response = new AjaxModalResponseDto();
+        $formData = new DocumentCheckDto($document);
+        $formAction = $this->generateUrl('app_admin_document_check', ['uuid' => $document->getUuid()]);
+        $form = $this->createForm(
+            DocumentCheckType::class,
+            $formData,
+            [
+                'action' => $formAction,
+                'ajax_submit' => true,
+                'document_type' => $document->getType(),
+            ]
+        );
+
+        $form->handleRequest($request);
+
+        if ($form->isSubmitted() && $form->isValid()) {
+            switch ($formData->getStatus()) {
+                case Upload::STATUS_CHECKED:
+                    $this->confirmDocument($document, 'confirm_contract', Upload::STATUS_CHECKED);
+                    break;
+                case Upload::STATUS_PAID:
+                    $this->confirmDocument($document, 'confirm_invoice', Upload::STATUS_PAID);
+                    break;
+                case Upload::STATUS_REJECTED:
+                    $this->rejectDocument($document);
+                    $this->eventDispatcher->dispatch(new DocumentRejectedEvent($formData), DocumentRejectedEvent::NAME);
+            }
+
+            $returnUrl = $this->generateUrl('app_admin_document_index');
+            $response->setCloseAndRedirect($returnUrl);
+        } else {
+            $response->setContent($this->renderView('admin/document/check.html.twig', [
+                'document' => $document,
+                'form' => $form,
+            ]));
+        }
+
+        return $this->json($response);
+    }
+
+    private function rejectDocument(Upload $document): void
+    {
+        $transition = Upload::TYPE_CONTRACT === $document->getType() ? 'reject_contract' : 'reject_invoice';
+        $this->workflow->apply($document->getDisposition(), $transition);
+        $document->setStatus(Upload::STATUS_REJECTED);
+        $this->entityManager->flush();
+
+        $this->addFlash('success', 'Das Dokument wurde abgelehnt');
+        $this->logger->info('Reject document', [
+            'document' => $document->getOriginalFilename(),
+        ]);
+
+    }
+
+    private function confirmDocument(Upload $document, string $transition, string $status): void
+    {
+        if (true === $this->workflow->can($document->getDisposition(), $transition)) {
+            $document->setStatus($status);
+            $this->workflow->apply($document->getDisposition(), $transition);
+            $this->entityManager->flush();
+            $this->addFlash('success', 'Das Dokument wurde bestätigt');
+            $this->logger->info('Confirm document', [
+                'document' => $document->getOriginalFilename(),
+            ]);
+        } else {
+            $blockers = $this->workflow->buildTransitionBlockerList($document->getDisposition(), $transition);
+            foreach ($blockers as $blocker) {
+                $this->addFlash('error', $blocker->getMessage());
+            }
+        }
+    }
+}
diff --git a/src/Controller/Admin/Document/DeleteController.php b/src/Controller/Admin/Document/DeleteController.php
deleted file mode 100644
index d12b05a..0000000
--- a/src/Controller/Admin/Document/DeleteController.php
+++ /dev/null
@@ -1,31 +0,0 @@
-<?php
-
-namespace App\Controller\Admin\Document;
-
-use App\Entity\Upload;
-use Doctrine\ORM\EntityManagerInterface;
-use Psr\Log\LoggerInterface;
-use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
-use Symfony\Component\HttpFoundation\Response;
-use Symfony\Component\Routing\Annotation\Route;
-use Symfony\Component\Security\Http\Attribute\IsGranted;
-
-class DeleteController extends AbstractController
-{
-    public function __construct(
-        private readonly EntityManagerInterface $entityManager,
-        private readonly LoggerInterface $logger
-    )
-    {
-    }
-
-    #[Route('/admin/document/delete/{uuid}', name: 'app_admin_document_delete')]
-    #[IsGranted('ROLE_ADMINISTRATIVE')]
-    public function index(Upload $document): Response
-    {
-        $this->entityManager->remove($document);
-        $this->entityManager->flush();
-
-        return $this->render('');
-    }
-}
diff --git a/src/Entity/Upload.php b/src/Entity/Upload.php
index c5814b7..f531601 100644
--- a/src/Entity/Upload.php
+++ b/src/Entity/Upload.php
@@ -22,10 +22,9 @@ class Upload implements BlameableEntityInterface, TimestampableEntityInterface
     public const TYPE_DOCUMENT = 'document';
 
     public const STATUS_NEW = 'new';
-    public const CHECKING = 'checking';
     public const STATUS_CHECKED = 'checked';
     public const STATUS_PAID = 'paid';
-    public const STATUS_ERROR = 'error';
+    public const STATUS_REJECTED = 'rejected';
 
     #[ORM\Id]
     #[ORM\GeneratedValue]
diff --git a/src/Event/DocumentRejectedEvent.php b/src/Event/DocumentRejectedEvent.php
new file mode 100644
index 0000000..b079bde
--- /dev/null
+++ b/src/Event/DocumentRejectedEvent.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Event;
+
+use App\Entity\Upload;
+use App\Model\DocumentCheckDto;
+use Symfony\Contracts\EventDispatcher\Event;
+
+class DocumentRejectedEvent extends Event
+{
+    public const NAME = 'document.rejected';
+
+    private Upload $document;
+    private ?string $comment;
+
+    public function __construct(DocumentCheckDto $documentCheckDto)
+    {
+        $this->document = $documentCheckDto->getUpload();
+        $this->comment = $documentCheckDto->getComment();
+    }
+
+    public function getDocument(): Upload
+    {
+        return $this->document;
+    }
+
+    public function getComment(): ?string
+    {
+        return $this->comment;
+    }
+}
\ No newline at end of file
diff --git a/src/Form/DocumentCheckType.php b/src/Form/DocumentCheckType.php
new file mode 100644
index 0000000..4ab305e
--- /dev/null
+++ b/src/Form/DocumentCheckType.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace App\Form;
+
+use App\Entity\Upload;
+use App\Model\DocumentCheckDto;
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
+use Symfony\Component\Form\Extension\Core\Type\TextareaType;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+class DocumentCheckType extends AbstractType
+{
+    public function buildForm(FormBuilderInterface $builder, array $options): void
+    {
+        $builder
+            ->add('status', ChoiceType::class, [
+                'label' => 'neuer Status',
+                'choices' => $options['status_choices'][$options['document_type']],
+            ])
+            ->add('comment', TextareaType::class, [
+                'label' => 'Kommentar/Begründung',
+                'required' => false,
+                'attr' => [
+                    'rows' => 3,
+                ],
+            ])
+        ;
+    }
+
+    public function configureOptions(OptionsResolver $resolver): void
+    {
+        $resolver
+            ->setDefaults([
+                'data_class' => DocumentCheckDto::class,
+                'status_choices' => [
+                    Upload::TYPE_CONTRACT => [
+                        'bestätigt' => Upload::STATUS_CHECKED,
+                        'abgelehnt' => Upload::STATUS_REJECTED,
+                    ],
+                    Upload::TYPE_INVOICE => [
+                        'bezahlt' => Upload::STATUS_PAID,
+                        'abgelehnt' => Upload::STATUS_REJECTED,
+                    ],
+                ],
+            ])
+            ->setRequired(['document_type'])
+            ->setAllowedTypes('document_type', 'string')
+            ->setAllowedValues('document_type', [Upload::TYPE_INVOICE, Upload::TYPE_CONTRACT])
+        ;
+    }
+}
\ No newline at end of file
diff --git a/src/Menu/TeamerMenuBuilder.php b/src/Menu/TeamerMenuBuilder.php
index 7282cc3..3db2ecd 100644
--- a/src/Menu/TeamerMenuBuilder.php
+++ b/src/Menu/TeamerMenuBuilder.php
@@ -49,6 +49,13 @@ class TeamerMenuBuilder extends AbstractMenuBuilder
                     [
                         'route' => 'app_teamer_bookmark_index',
                         'title' => 'Merkliste',
+                        'children' => [
+                            [
+                                'route' => 'app_teamer_assignment',
+                                'title' => 'Einsatzdetails',
+                                'routeParameters' => $this->getDefaultRouteParameters('uuid'),
+                            ]
+                        ],
                     ],
                     [
                         'route' => 'app_teamer_application_index',
diff --git a/src/Model/DocumentCheckDto.php b/src/Model/DocumentCheckDto.php
new file mode 100644
index 0000000..1db3fe7
--- /dev/null
+++ b/src/Model/DocumentCheckDto.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Model;
+
+use App\Entity\Upload;
+
+class DocumentCheckDto
+{
+    private Upload $upload;
+    private ?string $status = null;
+    private ?string $comment = null;
+
+    public function __construct(Upload $upload)
+    {
+        $this->upload = $upload;
+    }
+
+    public function getUpload(): Upload
+    {
+        return $this->upload;
+    }
+
+    public function getStatus(): string
+    {
+        return $this->status;
+    }
+
+    public function setStatus(string $status): static
+    {
+        $this->status = $status;
+
+        return $this;
+    }
+
+    public function getComment(): ?string
+    {
+        return $this->comment;
+    }
+
+    public function setComment(?string $comment): static
+    {
+        $this->comment = $comment;
+
+        return $this;
+    }
+}
\ No newline at end of file
diff --git a/src/Twig/AppRuntime.php b/src/Twig/AppRuntime.php
index 17aa4fc..c2bc698 100644
--- a/src/Twig/AppRuntime.php
+++ b/src/Twig/AppRuntime.php
@@ -103,7 +103,7 @@ class AppRuntime implements RuntimeExtensionInterface
         $class = 'upload-status-badge ';
         $class .= match($status) {
             Upload::STATUS_NEW => 'upload-status-badge--new',
-            Upload::STATUS_ERROR => 'upload-status-badge--error',
+            Upload::STATUS_REJECTED => 'upload-status-badge--error',
             Upload::STATUS_PAID => 'upload-status-badge--paid',
             Upload::STATUS_CHECKED => 'upload-status-badge--checked',
             default => 'upload-status-badge--default',
diff --git a/templates/admin/document/check.html.twig b/templates/admin/document/check.html.twig
new file mode 100644
index 0000000..e7bd9e0
--- /dev/null
+++ b/templates/admin/document/check.html.twig
@@ -0,0 +1,13 @@
+{{ form_start(form) }}
+<h2 class="font-bold text-lg pb-4">
+    {{ ('label.document.type.' ~ document.type)|trans }} {{ document.disposition.teamer }} vom {{ document.createdAt|date('d.m.Y') }}
+</h2>
+<div class="flex flex-col space-y-4 pb-4">
+    {{ form_row(form.status) }}
+    {{ form_row(form.comment) }}
+</div>
+<button type="submit" class="btn">
+    Aktualisieren
+</button>
+{{ form_rest(form) }}
+{{ form_end(form) }}
diff --git a/templates/admin/document/index.html.twig b/templates/admin/document/index.html.twig
index f249be9..322b7ef 100644
--- a/templates/admin/document/index.html.twig
+++ b/templates/admin/document/index.html.twig
@@ -60,9 +60,21 @@
                                     {{ upload.status|upload_status_badge }}
                                 </td>
                                 <td>
-                                    {% include '_partials/_dropdown.html.twig' with { 'links': [
-                                        { 'url': path('app_common_download', { 'uuid': upload.uuid }), 'label': 'Download', 'target': '_blank' },
-                                    ] } %}
+                                    <div class="flex items-center space-x-2">
+                                        <button type="button"
+                                                {{ stimulus_controller('modal-button', [], [], {'ajax-modal': '#ajax-modal'}) }}
+                                                {{ stimulus_action('modal-button', 'ajax', null, {
+                                                    'title': 'Dokumentenstatus bearbeiten',
+                                                    'url': path('app_admin_document_check', { 'uuid': upload.uuid })
+                                                }) }}>
+                                            {{ icon('edit') }}
+                                        </button>
+                                        <a href="{{ path('app_common_download', { 'uuid': upload.uuid }) }}"
+                                           target="_blank"
+                                           title="Download">
+                                            {{ icon('download') }}
+                                        </a>
+                                    </div>
                                 </td>
                             </tr>
                         {% else %}
diff --git a/translations/messages.de.yaml b/translations/messages.de.yaml
index 05f200a..0ad6b2a 100644
--- a/translations/messages.de.yaml
+++ b/translations/messages.de.yaml
@@ -19,8 +19,8 @@ label:
       new: neu
       checking: in Bearbeitung
       checked: geprüft
-      payed: bezahlt
-      error: Fehler
+      paid: bezahlt
+      rejected: abgelehnt
 
 message:
   confirm_contract: