diff --git a/apps/contactsinteraction/composer/composer/autoload_classmap.php b/apps/contactsinteraction/composer/composer/autoload_classmap.php
index 6cc1fd7d984..aff453c997d 100644
--- a/apps/contactsinteraction/composer/composer/autoload_classmap.php
+++ b/apps/contactsinteraction/composer/composer/autoload_classmap.php
@@ -16,5 +16,6 @@ return array(
     'OCA\\ContactsInteraction\\Db\\RecentContact' => $baseDir . '/../lib/Db/RecentContact.php',
     'OCA\\ContactsInteraction\\Db\\RecentContactMapper' => $baseDir . '/../lib/Db/RecentContactMapper.php',
     'OCA\\ContactsInteraction\\Listeners\\ContactInteractionListener' => $baseDir . '/../lib/Listeners/ContactInteractionListener.php',
+    'OCA\\ContactsInteraction\\Listeners\\UserDeletedListener' => $baseDir . '/../lib/Listeners/UserDeletedListener.php',
     'OCA\\ContactsInteraction\\Migration\\Version010000Date20200304152605' => $baseDir . '/../lib/Migration/Version010000Date20200304152605.php',
 );
diff --git a/apps/contactsinteraction/composer/composer/autoload_static.php b/apps/contactsinteraction/composer/composer/autoload_static.php
index c7cdc26dc68..9cee53ae045 100644
--- a/apps/contactsinteraction/composer/composer/autoload_static.php
+++ b/apps/contactsinteraction/composer/composer/autoload_static.php
@@ -31,6 +31,7 @@ class ComposerStaticInitContactsInteraction
         'OCA\\ContactsInteraction\\Db\\RecentContact' => __DIR__ . '/..' . '/../lib/Db/RecentContact.php',
         'OCA\\ContactsInteraction\\Db\\RecentContactMapper' => __DIR__ . '/..' . '/../lib/Db/RecentContactMapper.php',
         'OCA\\ContactsInteraction\\Listeners\\ContactInteractionListener' => __DIR__ . '/..' . '/../lib/Listeners/ContactInteractionListener.php',
+        'OCA\\ContactsInteraction\\Listeners\\UserDeletedListener' => __DIR__ . '/..' . '/../lib/Listeners/UserDeletedListener.php',
         'OCA\\ContactsInteraction\\Migration\\Version010000Date20200304152605' => __DIR__ . '/..' . '/../lib/Migration/Version010000Date20200304152605.php',
     );
 
diff --git a/apps/contactsinteraction/lib/AppInfo/Application.php b/apps/contactsinteraction/lib/AppInfo/Application.php
index b844ee1699c..6e3c1660ddc 100644
--- a/apps/contactsinteraction/lib/AppInfo/Application.php
+++ b/apps/contactsinteraction/lib/AppInfo/Application.php
@@ -9,11 +9,13 @@ declare(strict_types=1);
 namespace OCA\ContactsInteraction\AppInfo;
 
 use OCA\ContactsInteraction\Listeners\ContactInteractionListener;
+use OCA\ContactsInteraction\Listeners\UserDeletedListener;
 use OCP\AppFramework\App;
 use OCP\AppFramework\Bootstrap\IBootContext;
 use OCP\AppFramework\Bootstrap\IBootstrap;
 use OCP\AppFramework\Bootstrap\IRegistrationContext;
 use OCP\Contacts\Events\ContactInteractedWithEvent;
+use OCP\User\Events\UserDeletedEvent;
 
 class Application extends App implements IBootstrap {
 	public const APP_ID = 'contactsinteraction';
@@ -24,6 +26,7 @@ class Application extends App implements IBootstrap {
 
 	public function register(IRegistrationContext $context): void {
 		$context->registerEventListener(ContactInteractedWithEvent::class, ContactInteractionListener::class);
+		$context->registerEventListener(UserDeletedEvent::class, UserDeletedListener::class);
 	}
 
 	public function boot(IBootContext $context): void {
diff --git a/apps/contactsinteraction/lib/Db/RecentContactMapper.php b/apps/contactsinteraction/lib/Db/RecentContactMapper.php
index 02d2c1e8ea1..984e7fa9d00 100644
--- a/apps/contactsinteraction/lib/Db/RecentContactMapper.php
+++ b/apps/contactsinteraction/lib/Db/RecentContactMapper.php
@@ -112,4 +112,14 @@ class RecentContactMapper extends QBMapper {
 
 		$delete->executeStatement();
 	}
+
+	public function deleteByUserId(string $uid): void {
+		$qb = $this->db->getQueryBuilder();
+
+		$delete = $qb
+			->delete($this->getTableName())
+			->where($qb->expr()->eq('actor_uid', $qb->createNamedParameter($uid)));
+
+		$delete->executeStatement();
+	}
 }
diff --git a/apps/contactsinteraction/lib/Listeners/UserDeletedListener.php b/apps/contactsinteraction/lib/Listeners/UserDeletedListener.php
new file mode 100644
index 00000000000..91b0a5facec
--- /dev/null
+++ b/apps/contactsinteraction/lib/Listeners/UserDeletedListener.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\ContactsInteraction\Listeners;
+
+use OCA\ContactsInteraction\Db\RecentContactMapper;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\User\Events\UserDeletedEvent;
+
+/**
+ * @template-implements IEventListener<Event|UserDeletedEvent>
+ */
+class UserDeletedListener implements IEventListener {
+
+	public function __construct(
+		private readonly RecentContactMapper $recentContactMapper,
+	) {
+	}
+
+	#[\Override]
+	public function handle(Event $event): void {
+		if (!($event instanceof UserDeletedEvent)) {
+			return;
+		}
+
+		$this->recentContactMapper->deleteByUserId($event->getUser()->getUID());
+	}
+}