diff --git a/app/Services/Auth/IRecoveryCodeService.php b/app/Services/Auth/IRecoveryCodeService.php
index ab6de16e..dd9977be 100644
--- a/app/Services/Auth/IRecoveryCodeService.php
+++ b/app/Services/Auth/IRecoveryCodeService.php
@@ -67,4 +67,29 @@ public function countUnusedRecoveryCodes(User $user): int;
      * @return RecoveryCodesStatus remaining/total/low-threshold standing for the user
      */
     public function getStatus(User $user): RecoveryCodesStatus;
+
+    /**
+     * Disables 2FA for the user: clears two_factor_enabled and two_factor_enforced_at,
+     * deletes every recovery code and revokes every trusted device, all in a single
+     * transaction. A device_revoked audit event is recorded best-effort afterwards.
+     *
+     * $actor identifies who performs the operation:
+     *  - null: a system/console operation (e.g. idp:reset-2fa), no password is required;
+     *  - the same user: self-service, $currentPassword must match;
+     *  - another user: an administrator acting on the account, no password is required.
+     *    Authorizing the administrator is the caller's responsibility.
+     *
+     * The caller is responsible for emitting the settings_changed audit event, as only
+     * it knows the context (reason, actor, operator).
+     *
+     * Group-enforced users are still required to complete 2FA at login afterwards,
+     * as enforcement is derived from group membership (User::shouldRequire2FA()).
+     *
+     * @param User $user
+     * @param string|null $currentPassword
+     * @param User|null $actor
+     * @return void
+     * @throws ValidationException if the actor is the user and $currentPassword does not match
+     */
+    public function disableTwoFactor(User $user, ?string $currentPassword, ?User $actor): void;
 }
diff --git a/app/Services/Auth/RecoveryCodeService.php b/app/Services/Auth/RecoveryCodeService.php
index a626dd82..93a7a086 100644
--- a/app/Services/Auth/RecoveryCodeService.php
+++ b/app/Services/Auth/RecoveryCodeService.php
@@ -16,6 +16,7 @@
 use App\libs\Auth\Models\TwoFactorAuditLog;
 use App\libs\Auth\Models\UserRecoveryCode;
 use Auth\Repositories\IUserRecoveryCodeRepository;
+use Auth\Repositories\IUserTrustedDeviceRepository;
 use Auth\Repositories\IUserRepository;
 use Auth\User;
 use Illuminate\Support\Facades\Hash;
@@ -36,6 +37,7 @@ final class RecoveryCodeService implements IRecoveryCodeService
     public function __construct(
         private readonly IUserRecoveryCodeRepository $repository,
         private readonly IUserRepository $user_repository,
+        private readonly IUserTrustedDeviceRepository $trusted_device_repository,
         private readonly ITransactionService $tx_service,
         private readonly ITwoFactorAuditService $audit_service,
     ) {
@@ -121,6 +123,42 @@ public function enableTwoFactorAndGenerateCodes(User $user, string $method): arr
         return $codes;
     }
 
+    /**
+     * @inheritDoc
+     */
+    public function disableTwoFactor(User $user, ?string $currentPassword, ?User $actor): void
+    {
+        // self-service requires the current password; console and admin
+        // operations do not (see IRecoveryCodeService::disableTwoFactor)
+        if (!is_null($actor) && $actor->getId() === $user->getId()
+            && !$user->checkPassword(trim((string)$currentPassword))) {
+            throw new ValidationException('current_password is not correct.');
+        }
+
+        // a single transaction() call: nesting another one (e.g. through the audit
+        // service) inside it would let an inner failure close the entity manager
+        // under this still-running outer transaction
+        $this->tx_service->transaction(function () use ($user) {
+            $user->disable2FA();
+            $this->user_repository->add($user, false);
+            $this->repository->deleteAllForUser($user);
+            $this->trusted_device_repository->revokeAllForUser($user);
+        });
+
+        // Best-effort: 2FA is already disabled and the codes and devices are gone,
+        // an audit-logging failure must not make the caller believe it did not happen.
+        try {
+            $this->audit_service->log(
+                $user,
+                TwoFactorAuditLog::EventDeviceRevoked,
+                $user->getTwoFactorMethod(),
+                IPHelper::getUserIp()
+            );
+        } catch (\Throwable $ex) {
+            Log::warning($ex);
+        }
+    }
+
     /**
      * Invalidates every existing recovery code for the user and generates a
      * fresh batch, within the caller's already-open transaction.
diff --git a/tests/DisableTwoFactorIntegrationTest.php b/tests/DisableTwoFactorIntegrationTest.php
new file mode 100644
index 00000000..ccaff2d8
--- /dev/null
+++ b/tests/DisableTwoFactorIntegrationTest.php
@@ -0,0 +1,102 @@
+<?php namespace Tests;
+/**
+ * Copyright 2026 OpenStack Foundation
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ **/
+
+use App\libs\Auth\Models\TwoFactorAuditLog;
+use App\Services\Auth\IDeviceTrustService;
+use App\Services\Auth\IRecoveryCodeService;
+use Auth\User;
+use Illuminate\Support\Facades\DB;
+use LaravelDoctrine\ORM\Facades\EntityManager;
+
+/**
+ * Class DisableTwoFactorIntegrationTest
+ * IRecoveryCodeService::disableTwoFactor against the real database.
+ * @package Tests
+ */
+final class DisableTwoFactorIntegrationTest extends BrowserKitTestCase
+{
+    private IRecoveryCodeService $service;
+    private User $user;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->service = $this->app->make(IRecoveryCodeService::class);
+
+        $user = new User();
+        $user->setEmail('disable-2fa@nomail.com');
+        $user->setFirstName('Disable');
+        $user->setLastName('TwoFactor');
+        $user->setIdentifier('disable-2fa@nomail.com');
+        $user->setPassword('P@sswordS3cret');
+        $user->verifyEmail(false);
+        EntityManager::persist($user);
+        EntityManager::flush();
+        $this->user = $user;
+
+        // enrolled, with a code batch and two trusted devices
+        $this->service->enableTwoFactorAndGenerateCodes($user, User::MFAMethod_OTP);
+        $devices = $this->app->make(IDeviceTrustService::class);
+        $devices->trustDevice($user, 'agent-a', '127.0.0.1');
+        $devices->trustDevice($user, 'agent-b', '127.0.0.1');
+    }
+
+    private function userRow(): object
+    {
+        return DB::table('users')->where('id', $this->user->getId())->first();
+    }
+
+    public function testDisableClearsEverything(): void
+    {
+        $this->assertSame(1, (int)$this->userRow()->two_factor_enabled);
+        $this->assertSame(10, DB::table('user_recovery_codes')->where('user_id', $this->user->getId())->count());
+
+        $this->service->disableTwoFactor($this->user, null, null);
+
+        $row = $this->userRow();
+        $this->assertSame(0, (int)$row->two_factor_enabled);
+        $this->assertNull($row->two_factor_enforced_at);
+        $this->assertSame(0, DB::table('user_recovery_codes')->where('user_id', $this->user->getId())->count());
+
+        $devices = DB::table('user_trusted_devices')->where('user_id', $this->user->getId())->get();
+        $this->assertCount(2, $devices);
+        foreach ($devices as $device) {
+            $this->assertSame(1, (int)$device->is_revoked);
+        }
+
+        $this->assertSame(1, DB::table('two_factor_audit_log')
+            ->where('user_id', $this->user->getId())
+            ->where('event_type', TwoFactorAuditLog::EventDeviceRevoked)
+            ->count());
+        // settings_changed is the caller's responsibility
+        $this->assertSame(0, DB::table('two_factor_audit_log')
+            ->where('user_id', $this->user->getId())
+            ->where('event_type', TwoFactorAuditLog::EventSettingsChanged)
+            ->count());
+    }
+
+    public function testSelfServiceWithWrongPasswordLeavesStateUntouched(): void
+    {
+        try {
+            $this->service->disableTwoFactor($this->user, 'wrong', $this->user);
+            $this->fail('ValidationException expected');
+        } catch (\models\exceptions\ValidationException $ex) {
+        }
+
+        $this->assertSame(1, (int)$this->userRow()->two_factor_enabled);
+        $this->assertSame(10, DB::table('user_recovery_codes')->where('user_id', $this->user->getId())->count());
+        $this->assertSame(0, DB::table('user_trusted_devices')
+            ->where('user_id', $this->user->getId())->where('is_revoked', 1)->count());
+    }
+}
diff --git a/tests/unit/RecoveryCodeServiceDisableTwoFactorTest.php b/tests/unit/RecoveryCodeServiceDisableTwoFactorTest.php
new file mode 100644
index 00000000..f65463e9
--- /dev/null
+++ b/tests/unit/RecoveryCodeServiceDisableTwoFactorTest.php
@@ -0,0 +1,159 @@
+<?php namespace Tests\unit;
+/**
+ * Copyright 2026 OpenStack Foundation
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ **/
+
+use App\libs\Auth\Models\TwoFactorAuditLog;
+use App\Services\Auth\ITwoFactorAuditService;
+use App\Services\Auth\RecoveryCodeService;
+use Auth\Repositories\IUserRecoveryCodeRepository;
+use Auth\Repositories\IUserRepository;
+use Auth\Repositories\IUserTrustedDeviceRepository;
+use Auth\User;
+use Mockery;
+use models\exceptions\ValidationException;
+use Tests\BrowserKitTestCase;
+use Utils\Db\ITransactionService;
+
+/**
+ * Class RecoveryCodeServiceDisableTwoFactorTest
+ * @package Tests\unit
+ */
+final class RecoveryCodeServiceDisableTwoFactorTest extends BrowserKitTestCase
+{
+    private RecoveryCodeService $service;
+
+    /** @var \Mockery\MockInterface&IUserRecoveryCodeRepository */
+    private $code_repo;
+
+    /** @var \Mockery\MockInterface&IUserRepository */
+    private $user_repo;
+
+    /** @var \Mockery\MockInterface&IUserTrustedDeviceRepository */
+    private $device_repo;
+
+    /** @var \Mockery\MockInterface&ITwoFactorAuditService */
+    private $audit_service;
+
+    /** @var \Mockery\MockInterface&ITransactionService */
+    private $tx_service;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->code_repo = Mockery::mock(IUserRecoveryCodeRepository::class);
+        $this->user_repo = Mockery::mock(IUserRepository::class);
+        $this->device_repo = Mockery::mock(IUserTrustedDeviceRepository::class);
+        $this->audit_service = Mockery::mock(ITwoFactorAuditService::class);
+        $this->tx_service = Mockery::mock(ITransactionService::class);
+        $this->tx_service->shouldReceive('transaction')->andReturnUsing(fn($cb) => $cb())->byDefault();
+
+        $this->service = new RecoveryCodeService(
+            $this->code_repo,
+            $this->user_repo,
+            $this->device_repo,
+            $this->tx_service,
+            $this->audit_service
+        );
+    }
+
+    protected function tearDown(): void
+    {
+        // Mockery expectations are verified on close(): count them as assertions
+        $this->addToAssertionCount(Mockery::getContainer()->mockery_getExpectationCount());
+        Mockery::close();
+        parent::tearDown();
+    }
+
+    private function buildUser(int $id): \Mockery\MockInterface
+    {
+        $user = Mockery::mock(User::class);
+        $user->shouldReceive('getId')->andReturn($id);
+        $user->shouldReceive('getTwoFactorMethod')->andReturn(User::MFAMethod_OTP);
+        return $user;
+    }
+
+    private function expectFullDisable(\Mockery\MockInterface $user): void
+    {
+        $user->shouldReceive('disable2FA')->once();
+        $this->user_repo->shouldReceive('add')->once()->with($user, false);
+        $this->code_repo->shouldReceive('deleteAllForUser')->once()->with($user)->andReturn(10);
+        $this->device_repo->shouldReceive('revokeAllForUser')->once()->with($user);
+        $this->audit_service->shouldReceive('log')
+            ->once()
+            ->with($user, TwoFactorAuditLog::EventDeviceRevoked, User::MFAMethod_OTP, Mockery::type('string'));
+    }
+
+    public function testConsoleActorNeedsNoPassword(): void
+    {
+        $user = $this->buildUser(1);
+        $user->shouldNotReceive('checkPassword');
+        $this->expectFullDisable($user);
+
+        $this->service->disableTwoFactor($user, null, null);
+    }
+
+    public function testAdminActorNeedsNoPassword(): void
+    {
+        $user = $this->buildUser(1);
+        $user->shouldNotReceive('checkPassword');
+        $admin = $this->buildUser(2);
+        $this->expectFullDisable($user);
+
+        $this->service->disableTwoFactor($user, null, $admin);
+    }
+
+    public function testSelfServiceWithCorrectPassword(): void
+    {
+        $user = $this->buildUser(1);
+        $user->shouldReceive('checkPassword')->once()->with('secret')->andReturn(true);
+        $this->expectFullDisable($user);
+
+        $this->service->disableTwoFactor($user, ' secret ', $user);
+    }
+
+    public function testSelfServiceWithWrongPasswordChangesNothing(): void
+    {
+        $user = $this->buildUser(1);
+        $user->shouldReceive('checkPassword')->once()->andReturn(false);
+        $user->shouldNotReceive('disable2FA');
+        $this->tx_service->shouldNotReceive('transaction');
+        $this->code_repo->shouldNotReceive('deleteAllForUser');
+        $this->device_repo->shouldNotReceive('revokeAllForUser');
+        $this->audit_service->shouldNotReceive('log');
+
+        $this->expectException(ValidationException::class);
+        $this->service->disableTwoFactor($user, 'wrong', $user);
+    }
+
+    public function testSelfServiceWithoutPasswordIsRejected(): void
+    {
+        $user = $this->buildUser(1);
+        $user->shouldReceive('checkPassword')->once()->with('')->andReturn(false);
+        $user->shouldNotReceive('disable2FA');
+
+        $this->expectException(ValidationException::class);
+        $this->service->disableTwoFactor($user, null, $user);
+    }
+
+    public function testAuditFailureDoesNotFailTheOperation(): void
+    {
+        $user = $this->buildUser(1);
+        $user->shouldReceive('disable2FA')->once();
+        $this->user_repo->shouldReceive('add')->once();
+        $this->code_repo->shouldReceive('deleteAllForUser')->once()->andReturn(0);
+        $this->device_repo->shouldReceive('revokeAllForUser')->once();
+        $this->audit_service->shouldReceive('log')->once()->andThrow(new \RuntimeException('audit down'));
+
+        $this->service->disableTwoFactor($user, null, null);
+    }
+}