diff --git a/api/database/seeders/DevSeeder.php b/api/database/seeders/DevSeeder.php
index b99fb9df..2433ab4c 100644
--- a/api/database/seeders/DevSeeder.php
+++ b/api/database/seeders/DevSeeder.php
@@ -586,8 +586,9 @@ class DevSeeder extends Seeder
             // Person with unique email (no match expected)
             Person::create(['event_id' => $festival->id, 'crowd_type_id' => $vol, 'first_name' => 'Unique', 'last_name' => 'Persoon', 'email' => 'unique.persoon@nowhere.test', 'phone' => '+31612345044', 'status' => 'pending']);
 
+            $linked = $this->linkUsersToApprovedPersons($festival);
             $personCount = Person::where('event_id', $festival->id)->count();
-            $this->command->info("  {$personCount} persons created");
+            $this->command->info("  {$personCount} persons created ({$linked} user accounts linked)");
 
             // ── Named shift assignments (22) ──
 
@@ -975,6 +976,8 @@ class DevSeeder extends Seeder
             Person::factory()->count(3)->create(['event_id' => $braderie->id, 'crowd_type_id' => $vol, 'status' => 'pending']);
             Person::factory()->count(2)->create(['event_id' => $braderie->id, 'crowd_type_id' => $vol, 'status' => 'applied']);
 
+            $this->linkUsersToApprovedPersons($braderie);
+
             $this->command->info('  Braderie Dorpstown 2026 complete');
         });
     }
@@ -1094,6 +1097,8 @@ class DevSeeder extends Seeder
             Person::factory()->count(2)->create(['event_id' => $ijsbaan->id, 'crowd_type_id' => $crewType, 'status' => 'pending']);
             Person::factory()->count(5)->approved()->create(['event_id' => $ijsbaan->id, 'crowd_type_id' => $guestType]);
 
+            $this->linkUsersToApprovedPersons($ijsbaan);
+
             // ── Shift assignments (~80) ──
 
             $openShifts = collect($allShifts)->filter(fn (Shift $shift) => $shift->status === 'open' && $shift->slots_open_for_claiming > 0);
@@ -1241,6 +1246,8 @@ class DevSeeder extends Seeder
             // 2 suppliers
             Person::factory()->count(2)->approved()->create(['event_id' => $koningsdag->id, 'crowd_type_id' => $supplierType]);
 
+            $this->linkUsersToApprovedPersons($koningsdag);
+
             // ── Shift assignments (~150) ──
 
             // 120 completed + 12 cancelled + 8 no-show + 5 rejected + 5 pending
@@ -1348,6 +1355,36 @@ class DevSeeder extends Seeder
     // Helpers
     // =========================================================================
 
+    /**
+     * Create User accounts for approved/no_show persons that lack one.
+     * Mirrors the production approval flow (PersonController::approve).
+     */
+    private function linkUsersToApprovedPersons(Event $event): int
+    {
+        $linked = 0;
+
+        Person::withoutGlobalScopes()
+            ->where('event_id', $event->id)
+            ->whereIn('status', ['approved', 'no_show'])
+            ->whereNull('user_id')
+            ->each(function (Person $person) use (&$linked): void {
+                $user = User::firstOrCreate(
+                    ['email' => strtolower($person->email)],
+                    [
+                        'first_name' => $person->first_name,
+                        'last_name' => $person->last_name,
+                        'password' => Hash::make('password'),
+                    ]
+                );
+
+                $person->user_id = $user->id;
+                $person->save();
+                $linked++;
+            });
+
+        return $linked;
+    }
+
     private function createCrowdList(
         Event $event,
         string $name,
diff --git a/api/tests/Feature/Person/PersonTest.php b/api/tests/Feature/Person/PersonTest.php
index a6e0a291..60572577 100644
--- a/api/tests/Feature/Person/PersonTest.php
+++ b/api/tests/Feature/Person/PersonTest.php
@@ -196,4 +196,47 @@ class PersonTest extends TestCase
 
         $response->assertUnauthorized();
     }
+
+    public function test_approve_creates_user_account_for_person(): void
+    {
+        $person = Person::factory()->create([
+            'event_id' => $this->event->id,
+            'crowd_type_id' => $this->crowdType->id,
+            'status' => 'pending',
+            'email' => 'volunteer@example.com',
+        ]);
+
+        $this->assertNull($person->user_id);
+
+        Sanctum::actingAs($this->orgAdmin);
+
+        $response = $this->postJson("/api/v1/organisations/{$this->organisation->id}/events/{$this->event->id}/persons/{$person->id}/approve");
+
+        $response->assertOk();
+        $person->refresh();
+
+        $this->assertNotNull($person->user_id);
+        $this->assertDatabaseHas('users', ['email' => 'volunteer@example.com']);
+    }
+
+    public function test_approve_reuses_existing_user_account(): void
+    {
+        $existingUser = User::factory()->create(['email' => 'existing@example.com']);
+
+        $person = Person::factory()->create([
+            'event_id' => $this->event->id,
+            'crowd_type_id' => $this->crowdType->id,
+            'status' => 'pending',
+            'email' => 'existing@example.com',
+        ]);
+
+        Sanctum::actingAs($this->orgAdmin);
+
+        $this->postJson("/api/v1/organisations/{$this->organisation->id}/events/{$this->event->id}/persons/{$person->id}/approve")
+            ->assertOk();
+
+        $person->refresh();
+
+        $this->assertEquals($existingUser->id, $person->user_id);
+    }
 }