diff --git a/assets/icons/heroicons/sparkles.svg b/assets/icons/heroicons/sparkles.svg
new file mode 100644
index 000000000..cd7aed863
--- /dev/null
+++ b/assets/icons/heroicons/sparkles.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M9.813 15.904L9 18.75l-.813-2.846a4.5 4.5 0 0 0-3.09-3.09L2.25 12l2.846-.813a4.5 4.5 0 0 0 3.09-3.09L9 5.25l.813 2.846a4.5 4.5 0 0 0 3.09 3.09L15.75 12l-2.846.813a4.5 4.5 0 0 0-3.09 3.09m8.445-7.188L18 9.75l-.259-1.035a3.38 3.38 0 0 0-2.455-2.456L14.25 6l1.036-.259a3.38 3.38 0 0 0 2.455-2.456L18 2.25l.259 1.035a3.38 3.38 0 0 0 2.456 2.456L21.75 6l-1.035.259a3.38 3.38 0 0 0-2.456 2.456m-1.365 11.852L16.5 21.75l-.394-1.183a2.25 2.25 0 0 0-1.423-1.423L13.5 18.75l1.183-.394a2.25 2.25 0 0 0 1.423-1.423l.394-1.183l.394 1.183a2.25 2.25 0 0 0 1.423 1.423l1.183.394l-1.183.394a2.25 2.25 0 0 0-1.423 1.423"/></svg>
\ No newline at end of file
diff --git a/default_translations/de/messages.de.yml b/default_translations/de/messages.de.yml
index dee884904..6ac2c1687 100644
--- a/default_translations/de/messages.de.yml
+++ b/default_translations/de/messages.de.yml
@@ -554,6 +554,10 @@ admin:
       title: Inaktive Nutzer:innen entfernen
       description: Löscht Nutzer:innen, die seit mehr als 2 Jahren inaktiv sind. Admin- und permanente Konten werden ausgenommen.
       button: Inaktive entfernen
+    removeUnredeemedVouchers:
+      title: Nicht eingelöste Einladungscodes entfernen
+      description: Entfernt nicht eingelöste Einladungscodes von gelöschten Nutzer:innen.
+      button: Einladungscodes entfernen
     unknown_task: Unbekannte Wartungsaufgabe.
     dispatched: Wartungsaufgabe erfolgreich gestartet.
   table:
diff --git a/default_translations/en/messages.en.yml b/default_translations/en/messages.en.yml
index 6d1ce8865..3116b1ab1 100644
--- a/default_translations/en/messages.en.yml
+++ b/default_translations/en/messages.en.yml
@@ -453,6 +453,10 @@ admin:
       title: Remove Inactive Users
       description: Delete users who have been inactive for more than 2 years. Admin and permanent users are excluded.
       button: Remove inactive users
+    removeUnredeemedVouchers:
+      title: Remove Unredeemed Invite Codes
+      description: Remove unredeemed invite codes from deleted users.
+      button: Remove unredeemed invite codes
     unknown_task: Unknown maintenance task.
     dispatched: Maintenance task dispatched successfully.
   title: Settings
diff --git a/features/admin_maintenance.feature b/features/admin_maintenance.feature
index df5eff512..8abdbb4c3 100644
--- a/features/admin_maintenance.feature
+++ b/features/admin_maintenance.feature
@@ -26,6 +26,7 @@ Feature: Admin (Maintenance)
     And I should see "Prune Webhook Deliveries"
     And I should see "Remove Inactive Users"
     And I should see "Unlink Redeemed Invite Codes"
+    And I should see "Remove Unredeemed Invite Codes"
 
   @maintenance
   Scenario: Admin can dispatch prune user notifications task
@@ -54,3 +55,10 @@ Feature: Admin (Maintenance)
     When I am on "/admin/maintenance"
     And I press "Unlink invite codes"
     Then I should see "Maintenance task dispatched successfully"
+
+  @maintenance
+  Scenario: Admin can dispatch remove unredeemed vouchers task
+    Given I am authenticated as "louis@example.org"
+    When I am on "/admin/maintenance"
+    And I press "Remove unredeemed invite codes"
+    Then I should see "Maintenance task dispatched successfully"
diff --git a/src/Controller/Admin/MaintenanceController.php b/src/Controller/Admin/MaintenanceController.php
index 98b45066d..badda3474 100644
--- a/src/Controller/Admin/MaintenanceController.php
+++ b/src/Controller/Admin/MaintenanceController.php
@@ -8,6 +8,7 @@
 use App\Message\PruneUserNotifications;
 use App\Message\PruneWebhookDeliveries;
 use App\Message\RemoveInactiveUsers;
+use App\Message\RemoveUnredeemedVouchers;
 use App\Message\UnlinkRedeemedVouchers;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\RedirectResponse;
@@ -24,6 +25,7 @@ final class MaintenanceController extends AbstractController
         'prune_user_notifications' => PruneUserNotifications::class,
         'prune_webhook_deliveries' => PruneWebhookDeliveries::class,
         'remove_inactive_users' => RemoveInactiveUsers::class,
+        'remove_unredeemed_vouchers' => RemoveUnredeemedVouchers::class,
         'unlink_redeemed_vouchers' => UnlinkRedeemedVouchers::class,
     ];
 
diff --git a/src/Message/RemoveUnredeemedVouchers.php b/src/Message/RemoveUnredeemedVouchers.php
new file mode 100644
index 000000000..567a7aea1
--- /dev/null
+++ b/src/Message/RemoveUnredeemedVouchers.php
@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Message;
+
+use Symfony\Component\Messenger\Attribute\AsMessage;
+
+#[AsMessage('async')]
+final class RemoveUnredeemedVouchers
+{
+}
diff --git a/src/MessageHandler/RemoveUnredeemedVouchersHandler.php b/src/MessageHandler/RemoveUnredeemedVouchersHandler.php
new file mode 100644
index 000000000..5f06c7761
--- /dev/null
+++ b/src/MessageHandler/RemoveUnredeemedVouchersHandler.php
@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\MessageHandler;
+
+use App\Entity\Voucher;
+use App\Message\RemoveUnredeemedVouchers;
+use Doctrine\ORM\EntityManagerInterface;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+
+#[AsMessageHandler(sign: true)]
+final readonly class RemoveUnredeemedVouchersHandler
+{
+    public function __construct(
+        private EntityManagerInterface $entityManager,
+        private LoggerInterface $logger,
+    ) {
+    }
+
+    public function __invoke(RemoveUnredeemedVouchers $message): void
+    {
+        /** @var Voucher[] $vouchers */
+        $vouchers = $this->entityManager->getRepository(Voucher::class)
+            ->createQueryBuilder('v')
+            ->join('v.user', 'u')
+            ->where('v.redeemedTime IS NULL')
+            ->andWhere('u.deleted = true')
+            ->getQuery()
+            ->getResult();
+
+        foreach ($vouchers as $voucher) {
+            $this->entityManager->remove($voucher);
+        }
+
+        $this->entityManager->flush();
+
+        $this->logger->info('Removed unredeemed vouchers of deleted users', ['count' => count($vouchers)]);
+    }
+}
diff --git a/src/Schedule/MaintenanceSchedule.php b/src/Schedule/MaintenanceSchedule.php
index 57ace03a9..be3429159 100644
--- a/src/Schedule/MaintenanceSchedule.php
+++ b/src/Schedule/MaintenanceSchedule.php
@@ -7,6 +7,7 @@
 use App\Message\PruneUserNotifications;
 use App\Message\PruneWebhookDeliveries;
 use App\Message\RemoveInactiveUsers;
+use App\Message\RemoveUnredeemedVouchers;
 use App\Message\SendWeeklyReport;
 use App\Message\UnlinkRedeemedVouchers;
 use DateTimeImmutable;
@@ -33,6 +34,7 @@ public function getSchedule(): Schedule
             ->add(RecurringMessage::every('1 day', new PruneWebhookDeliveries(), new DateTimeImmutable('03:00')))
             ->add(RecurringMessage::every('1 day', new PruneUserNotifications(), new DateTimeImmutable('03:30')))
             ->add(RecurringMessage::every('1 day', new UnlinkRedeemedVouchers(), new DateTimeImmutable('04:00')))
+            ->add(RecurringMessage::every('1 week', new RemoveUnredeemedVouchers(), new DateTimeImmutable('05:00')))
             ->add(RecurringMessage::every('1 week', new RemoveInactiveUsers(), new DateTimeImmutable('06:00')))
             ->add(RecurringMessage::every('1 week', new SendWeeklyReport(), new DateTimeImmutable('07:00')));
     }
diff --git a/templates/Admin/Maintenance/show.html.twig b/templates/Admin/Maintenance/show.html.twig
index efeaf4f5a..be508cbb5 100644
--- a/templates/Admin/Maintenance/show.html.twig
+++ b/templates/Admin/Maintenance/show.html.twig
@@ -49,6 +49,15 @@
                     task: 'unlink_redeemed_vouchers',
                     csrf_token_id: 'maintenance_unlink_redeemed_vouchers',
                 } %}
+
+                {% include 'Admin/_maintenance_card.html.twig' with {
+                    icon: 'heroicons:trash',
+                    title_key: 'admin.maintenance.removeUnredeemedVouchers.title',
+                    description_key: 'admin.maintenance.removeUnredeemedVouchers.description',
+                    button_key: 'admin.maintenance.removeUnredeemedVouchers.button',
+                    task: 'remove_unredeemed_vouchers',
+                    csrf_token_id: 'maintenance_remove_unredeemed_vouchers',
+                } %}
             </div>
         </div>
     </div>
diff --git a/tests/MessageHandler/RemoveUnredeemedVouchersHandlerTest.php b/tests/MessageHandler/RemoveUnredeemedVouchersHandlerTest.php
new file mode 100644
index 000000000..9d9024397
--- /dev/null
+++ b/tests/MessageHandler/RemoveUnredeemedVouchersHandlerTest.php
@@ -0,0 +1,102 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\MessageHandler;
+
+use App\Entity\User;
+use App\Entity\Voucher;
+use App\Message\RemoveUnredeemedVouchers;
+use App\MessageHandler\RemoveUnredeemedVouchersHandler;
+use App\Repository\VoucherRepository;
+use Doctrine\ORM\EntityManagerInterface;
+use PHPUnit\Framework\TestCase;
+use Psr\Log\LoggerInterface;
+
+class RemoveUnredeemedVouchersHandlerTest extends TestCase
+{
+    public function testRemovesUnredeemedVouchersOfDeletedUsers(): void
+    {
+        $deletedUser = new User('deleted@example.org');
+        $deletedUser->setDeleted(true);
+
+        $voucher1 = new Voucher('A');
+        $voucher1->setUser($deletedUser);
+
+        $voucher2 = new Voucher('B');
+        $voucher2->setUser($deletedUser);
+
+        $expectedResultSet = [$voucher1, $voucher2];
+
+        $qb = $this->getMockBuilder(\Doctrine\ORM\QueryBuilder::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['join', 'where', 'andWhere', 'getQuery'])
+            ->getMock();
+
+        $qb->expects($this->any())->method('join')->willReturnSelf();
+        $qb->expects($this->any())->method('where')->willReturnSelf();
+        $qb->expects($this->any())->method('andWhere')->willReturnSelf();
+
+        $query = $this->getMockBuilder(\Doctrine\ORM\Query::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['getResult'])
+            ->getMock();
+        $query->expects($this->once())->method('getResult')->willReturn($expectedResultSet);
+
+        $qb->expects($this->once())->method('getQuery')->willReturn($query);
+
+        $repo = $this->getMockBuilder(VoucherRepository::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['createQueryBuilder'])
+            ->getMock();
+        $repo->expects($this->once())->method('createQueryBuilder')->willReturn($qb);
+
+        $em = $this->createMock(EntityManagerInterface::class);
+        $em->expects($this->any())->method('getRepository')->willReturn($repo);
+        $em->expects($this->exactly(2))->method('remove')->with($this->isInstanceOf(Voucher::class));
+        $em->expects($this->once())->method('flush');
+
+        $logger = $this->createMock(LoggerInterface::class);
+        $logger->expects($this->once())->method('info')->with('Removed unredeemed vouchers of deleted users', ['count' => 2]);
+
+        $handler = new RemoveUnredeemedVouchersHandler($em, $logger);
+        $handler(new RemoveUnredeemedVouchers());
+    }
+
+    public function testHandlesEmptyResultGracefully(): void
+    {
+        $qb = $this->getMockBuilder(\Doctrine\ORM\QueryBuilder::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['join', 'where', 'andWhere', 'getQuery'])
+            ->getMock();
+
+        $qb->expects($this->any())->method('join')->willReturnSelf();
+        $qb->expects($this->any())->method('where')->willReturnSelf();
+        $qb->expects($this->any())->method('andWhere')->willReturnSelf();
+
+        $query = $this->getMockBuilder(\Doctrine\ORM\Query::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['getResult'])
+            ->getMock();
+        $query->expects($this->once())->method('getResult')->willReturn([]);
+
+        $qb->expects($this->once())->method('getQuery')->willReturn($query);
+
+        $repo = $this->getMockBuilder(VoucherRepository::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['createQueryBuilder'])
+            ->getMock();
+        $repo->expects($this->once())->method('createQueryBuilder')->willReturn($qb);
+
+        $em = $this->createMock(EntityManagerInterface::class);
+        $em->expects($this->any())->method('getRepository')->willReturn($repo);
+        $em->expects($this->never())->method('remove');
+        $em->expects($this->once())->method('flush');
+
+        $logger = $this->createMock(LoggerInterface::class);
+        $logger->expects($this->once())->method('info')->with('Removed unredeemed vouchers of deleted users', ['count' => 0]);
+
+        $handler = new RemoveUnredeemedVouchersHandler($em, $logger);
+        $handler(new RemoveUnredeemedVouchers());
+    }
+}
diff --git a/tests/Schedule/MaintenanceScheduleTest.php b/tests/Schedule/MaintenanceScheduleTest.php
index 1b78540d4..a2bc74a4b 100644
--- a/tests/Schedule/MaintenanceScheduleTest.php
+++ b/tests/Schedule/MaintenanceScheduleTest.php
@@ -7,6 +7,7 @@
 use App\Message\PruneUserNotifications;
 use App\Message\PruneWebhookDeliveries;
 use App\Message\RemoveInactiveUsers;
+use App\Message\RemoveUnredeemedVouchers;
 use App\Message\SendWeeklyReport;
 use App\Message\UnlinkRedeemedVouchers;
 use App\Schedule\MaintenanceSchedule;
@@ -27,10 +28,11 @@ public function testScheduleContainsAllExpectedMessages(): void
             $recurringMessages,
         );
 
-        self::assertCount(5, $recurringMessages);
+        self::assertCount(6, $recurringMessages);
         self::assertContains(PruneWebhookDeliveries::class, $messageTypes);
         self::assertContains(PruneUserNotifications::class, $messageTypes);
         self::assertContains(UnlinkRedeemedVouchers::class, $messageTypes);
+        self::assertContains(RemoveUnredeemedVouchers::class, $messageTypes);
         self::assertContains(RemoveInactiveUsers::class, $messageTypes);
         self::assertContains(SendWeeklyReport::class, $messageTypes);
     }