diff --git a/includes/class-handler.php b/includes/class-handler.php
index c507402ba..da81f5714 100644
--- a/includes/class-handler.php
+++ b/includes/class-handler.php
@@ -49,6 +49,7 @@ public static function register_handlers() {
 	 */
 	public static function register_outbox_handlers() {
 		Handler\Outbox\Announce::init();
+		Handler\Outbox\Arrive::init();
 		Handler\Outbox\Create::init();
 		Handler\Outbox\Delete::init();
 		Handler\Outbox\Follow::init();
diff --git a/includes/handler/outbox/class-arrive.php b/includes/handler/outbox/class-arrive.php
new file mode 100644
index 000000000..8f7b7ba4a
--- /dev/null
+++ b/includes/handler/outbox/class-arrive.php
@@ -0,0 +1,170 @@
+<?php
+/**
+ * Outbox Arrive handler file.
+ *
+ * @package Activitypub
+ */
+
+namespace Activitypub\Handler\Outbox;
+
+use Activitypub\Collection\Posts;
+
+use function Activitypub\is_activity_public;
+
+/**
+ * Handle outgoing Arrive activities.
+ *
+ * @since unreleased
+ */
+class Arrive {
+	/**
+	 * Initialize the class, registering WordPress hooks.
+	 *
+	 * @since unreleased
+	 */
+	public static function init() {
+		\add_filter( 'activitypub_outbox_arrive', array( self::class, 'handle_arrive' ), 10, 3 );
+		\add_action( 'activitypub_outbox_arrive_sent', array( self::class, 'save_location' ), 10, 4 );
+	}
+
+	/**
+	 * Handle outgoing "Arrive" activities from local actors.
+	 *
+	 * Arrive is an intransitive activity indicating that the actor
+	 * has arrived at a location. Creates a WordPress post so the
+	 * check-in appears on the blog. Location geodata is saved via
+	 * the `activitypub_outbox_arrive_sent` action.
+	 *
+	 * @since unreleased
+	 *
+	 * @param array       $data       The activity data array.
+	 * @param int         $user_id    The user ID.
+	 * @param string|null $visibility Content visibility.
+	 *
+	 * @return \WP_Post|\WP_Error|false The created post, error, or false.
+	 */
+	public static function handle_arrive( $data, $user_id = null, $visibility = null ) {
+		if ( ! is_activity_public( $data ) ) {
+			return false;
+		}
+
+		$location_name = self::get_location_name( $data['location'] ?? null );
+
+		$title = $location_name
+			? sprintf(
+				/* translators: %s: location name */
+				\__( 'Checked in at %s', 'activitypub' ),
+				$location_name
+			)
+			: \__( 'Check-in', 'activitypub' );
+
+		/*
+		 * Synthesize a Create-style activity for Posts::create().
+		 * Arrive is intransitive (no object), so we build a Note
+		 * from the activity-level content/summary.
+		 */
+		$activity = array(
+			'object' => array(
+				'type'    => 'Note',
+				'name'    => $title,
+				'content' => $data['content'] ?? self::get_summary( $data ),
+			),
+			'to'     => $data['to'] ?? array(),
+			'cc'     => $data['cc'] ?? array(),
+		);
+
+		$post = Posts::create( $activity, $user_id, $visibility );
+
+		if ( \is_wp_error( $post ) ) {
+			return $post;
+		}
+
+		/**
+		 * Fires after an outgoing Arrive activity has created a post.
+		 *
+		 * @param int        $post_id    The created post ID.
+		 * @param array|null $location   The location data from the activity.
+		 * @param array      $data       The activity data.
+		 * @param int        $user_id    The user ID.
+		 */
+		\do_action( 'activitypub_outbox_arrive_sent', $post->ID, $data['location'] ?? null, $data, $user_id );
+
+		return $post;
+	}
+
+	/**
+	 * Save location geodata on the created post.
+	 *
+	 * Hooked to `activitypub_outbox_arrive_sent`. Uses the standard
+	 * `geo_*` meta keys that the Post transformer reads back when
+	 * converting to ActivityPub Place objects.
+	 *
+	 * @since unreleased
+	 *
+	 * @param int        $post_id  The post ID.
+	 * @param array|null $location The ActivityPub location data.
+	 * @param array      $data     The activity data.
+	 * @param int        $user_id  The user ID.
+	 */
+	public static function save_location( $post_id, $location, $data, $user_id ) {
+		if ( ! \is_array( $location ) ) {
+			return;
+		}
+
+		if ( ! empty( $location['name'] ) ) {
+			\update_post_meta( $post_id, 'geo_address', \sanitize_text_field( $location['name'] ) );
+		}
+
+		if ( isset( $location['latitude'] ) && \is_numeric( $location['latitude'] ) ) {
+			\update_post_meta( $post_id, 'geo_latitude', (float) $location['latitude'] );
+		}
+
+		if ( isset( $location['longitude'] ) && \is_numeric( $location['longitude'] ) ) {
+			\update_post_meta( $post_id, 'geo_longitude', (float) $location['longitude'] );
+		}
+
+		if ( ! empty( $location['name'] ) || ( isset( $location['latitude'] ) && isset( $location['longitude'] ) ) ) {
+			\update_post_meta( $post_id, 'geo_public', '1' );
+		}
+	}
+
+	/**
+	 * Extract the summary string from an Arrive activity.
+	 *
+	 * Supports both `summary` (string) and `summaryMap` (language map).
+	 *
+	 * @param array $data The activity data.
+	 *
+	 * @return string The summary text.
+	 */
+	private static function get_summary( $data ) {
+		if ( ! empty( $data['summary'] ) ) {
+			return $data['summary'];
+		}
+
+		if ( ! empty( $data['summaryMap'] ) && \is_array( $data['summaryMap'] ) ) {
+			return \reset( $data['summaryMap'] );
+		}
+
+		return '';
+	}
+
+	/**
+	 * Extract a human-readable name from an ActivityPub location.
+	 *
+	 * @param mixed $location The location data (array or string).
+	 *
+	 * @return string|null The location name or null.
+	 */
+	private static function get_location_name( $location ) {
+		if ( \is_array( $location ) && ! empty( $location['name'] ) ) {
+			return \sanitize_text_field( $location['name'] );
+		}
+
+		if ( \is_string( $location ) && ! empty( $location ) ) {
+			return \sanitize_text_field( $location );
+		}
+
+		return null;
+	}
+}
diff --git a/includes/rest/class-outbox-controller.php b/includes/rest/class-outbox-controller.php
index 917ba5b0c..68cc4c065 100644
--- a/includes/rest/class-outbox-controller.php
+++ b/includes/rest/class-outbox-controller.php
@@ -427,9 +427,18 @@ public function create_item( $request ) {
 		$object_id = get_object_id( $result );
 
 		if ( $object_id ) {
-			// Handler returned a WP_Post or WP_Comment; look up its outbox entry.
+			/*
+			 * Handler returned a WP_Post or WP_Comment; look up its outbox entry.
+			 * Fall back to Create if the specific type isn't found, because the
+			 * Post scheduler wraps new posts in Create activities regardless of
+			 * the original C2S activity type (e.g. Arrive → Create).
+			 */
 			$activity_type = \ucfirst( $data['type'] ?? 'Create' );
 			$outbox_item   = Outbox::get_by_object_id( $object_id, $activity_type );
+
+			if ( ! $outbox_item && 'Create' !== $activity_type ) {
+				$outbox_item = Outbox::get_by_object_id( $object_id, 'Create' );
+			}
 		} elseif ( \is_int( $result ) && $result > 0 ) {
 			// Handler returned an outbox post ID directly.
 			$outbox_item = \get_post( $result );
diff --git a/tests/phpunit/tests/includes/rest/class-test-outbox-controller.php b/tests/phpunit/tests/includes/rest/class-test-outbox-controller.php
index ada960366..bc9e0d48d 100644
--- a/tests/phpunit/tests/includes/rest/class-test-outbox-controller.php
+++ b/tests/phpunit/tests/includes/rest/class-test-outbox-controller.php
@@ -790,14 +790,14 @@ public function test_c2s_create_article_has_no_post_format() {
 	}
 
 	/**
-	 * Test C2S POST with an intransitive activity and object actor payload.
+	 * Test C2S POST with an Arrive activity creates a WordPress post.
 	 *
-	 * Ensures activities like Arrive do not trigger object-ID resolution errors
-	 * when the actor is provided as an object and no explicit object is present.
+	 * Ensures the Arrive handler creates a check-in post with location
+	 * geodata and stores the activity in the outbox.
 	 *
 	 * @covers ::create_item
 	 */
-	public function test_c2s_arrive_with_actor_object() {
+	public function test_c2s_arrive_creates_post_with_geodata() {
 		$user = \Activitypub\Collection\Actors::get_by_id( self::$user_id );
 
 		$data = array(
@@ -809,8 +809,11 @@ public function test_c2s_arrive_with_actor_object() {
 				'url'  => $user->get_url(),
 			),
 			'location' => array(
-				'id'   => 'https://places.pub/relation/659839',
-				'name' => 'Ettlingen',
+				'type'      => 'Place',
+				'id'        => 'https://places.pub/relation/659839',
+				'name'      => 'Ettlingen',
+				'latitude'  => 48.9408,
+				'longitude' => 8.4075,
 			),
 			'content'  => 'Arrived.',
 			'to'       => 'https://www.w3.org/ns/activitystreams#Public',
@@ -827,27 +830,68 @@ public function test_c2s_arrive_with_actor_object() {
 		$this->assertEquals( 201, $response->get_status() );
 
 		$response_data = $response->get_data();
-		$this->assertSame( 'Arrive', $response_data['type'] );
+		$this->assertSame( 'Create', $response_data['type'] );
 
-		$outbox_items = \get_posts(
-			array(
-				'post_type'      => Outbox::POST_TYPE,
-				'post_status'    => 'any',
-				'author'         => self::$user_id,
-				'posts_per_page' => 1,
-				'orderby'        => 'ID',
-				'order'          => 'DESC',
-				// phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query
-				'meta_query'     => array(
-					array(
-						'key'   => '_activitypub_activity_type',
-						'value' => 'Arrive',
-					),
-				),
-			)
+		// Find the created post from the response object ID.
+		$object  = $response_data['object'];
+		$post_id = \url_to_postid( $object['id'] );
+		$this->assertGreaterThan( 0, $post_id, 'Arrive should create a WordPress post.' );
+
+		$this->assertSame( 'status', \get_post_format( $post_id ), 'Arrive post should have status format.' );
+		$this->assertStringContainsString( 'Ettlingen', \get_the_title( $post_id ), 'Post title should contain location name.' );
+
+		// Verify geodata meta.
+		$this->assertSame( 'Ettlingen', \get_post_meta( $post_id, 'geo_address', true ) );
+		$this->assertEquals( 48.9408, (float) \get_post_meta( $post_id, 'geo_latitude', true ) );
+		$this->assertEquals( 8.4075, (float) \get_post_meta( $post_id, 'geo_longitude', true ) );
+		$this->assertSame( '1', \get_post_meta( $post_id, 'geo_public', true ) );
+	}
+
+	/**
+	 * Test C2S POST with Arrive activity without coordinates.
+	 *
+	 * Ensures the handler works when the location only has a name
+	 * but no latitude/longitude, as is common with checkin.swf.pub.
+	 *
+	 * @covers ::create_item
+	 */
+	public function test_c2s_arrive_with_name_only_location() {
+		$user = \Activitypub\Collection\Actors::get_by_id( self::$user_id );
+
+		$data = array(
+			'@context'   => 'https://www.w3.org/ns/activitystreams',
+			'type'       => 'Arrive',
+			'actor'      => $user->get_id(),
+			'location'   => array(
+				'id'   => 'https://places.pub/relation/659839',
+				'name' => 'Ettlingen',
+			),
+			'content'    => 'Hello!',
+			'summaryMap' => array(
+				'en' => 'Arrived at Ettlingen',
+			),
+			'to'         => 'https://www.w3.org/ns/activitystreams#Public',
+			'cc'         => $user->get_followers(),
 		);
 
-		$this->assertNotEmpty( $outbox_items );
-		$this->assertSame( $user->get_id(), \get_post_meta( $outbox_items[0]->ID, '_activitypub_object_id', true ) );
+		$request = new \WP_REST_Request( 'POST', '/' . ACTIVITYPUB_REST_NAMESPACE . '/actors/' . self::$user_id . '/outbox' );
+		$request->set_header( 'Content-Type', 'application/activity+json' );
+		$request->set_body( \wp_json_encode( $data ) );
+
+		\wp_set_current_user( self::$user_id );
+
+		$response = \rest_get_server()->dispatch( $request );
+		$this->assertEquals( 201, $response->get_status() );
+
+		// Find the created post from the response object ID.
+		$response_data = $response->get_data();
+		$post_id       = \url_to_postid( $response_data['object']['id'] );
+		$this->assertGreaterThan( 0, $post_id, 'Arrive should create a WordPress post.' );
+
+		// Verify geodata - address saved but no coordinates.
+		$this->assertSame( 'Ettlingen', \get_post_meta( $post_id, 'geo_address', true ) );
+		$this->assertEmpty( \get_post_meta( $post_id, 'geo_latitude', true ), 'No latitude when not provided.' );
+		$this->assertEmpty( \get_post_meta( $post_id, 'geo_longitude', true ), 'No longitude when not provided.' );
+		$this->assertSame( '1', \get_post_meta( $post_id, 'geo_public', true ), 'geo_public set when name is present.' );
 	}
 }