diff --git a/auth.php b/auth.php
index fa91355..ace54ec 100644
--- a/auth.php
+++ b/auth.php
@@ -93,10 +93,14 @@ class auth_plugin_emailotp extends auth_plugin_base {
                     'auth'       => $this->authtype,
                     'deleted'    => 0,
                 ]))) {
-            $this->redirect($username, $this->gen_otp($username)
-                ? notification::NOTIFY_SUCCESS
-                : notification::NOTIFY_ERROR
-            );
+            if ($this->gen_otp($username)) {
+                \auth_emailotp\event\otp_generated::create(array(
+                    'other' => array('email' => $username),
+                ))->trigger();
+                $this->redirect($username, notification::NOTIFY_SUCCESS);
+            } else { 
+                $this->redirect($username, notification::NOTIFY_ERROR);
+            }
         }
         // OTP exits but validation failed - reset if revoke threshold is set.
         if (isset($_SESSION[self::COMPONENT_NAME])) {
@@ -105,9 +109,12 @@ class auth_plugin_emailotp extends auth_plugin_base {
                     $_SESSION[self::COMPONENT_NAME]['login_failed_count'] >= $this->config->revokethreshold) {
                 unset($_SESSION[self::COMPONENT_NAME]);
                 \core\notification::add(
-                    (string)new lang_string('otpinvalidated', self::COMPONENT_NAME, null, $CFG->lang),
+                    (string)new lang_string('otprevoked', self::COMPONENT_NAME, null, $CFG->lang),
                     notification::NOTIFY_WARNING
                 );
+                \auth_emailotp\event\otp_revoked::create(array(
+                    'other' => array('email' => $username),
+                ))->trigger();
             }
         }
         return false;
diff --git a/classes/event/otp_generated.php b/classes/event/otp_generated.php
new file mode 100644
index 0000000..6ac2d08
--- /dev/null
+++ b/classes/event/otp_generated.php
@@ -0,0 +1,88 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Event when one-time password is generated.
+ *
+ * @package    auth_emailotp
+ * @copyright  2020 Pawel Suwinski <psuw@wp.pl>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace auth_emailotp\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Event when one-time password is generated.
+ *
+ * @package    auth_emailotp
+ * @copyright  2020 Pawel Suwinski <psuw@wp.pl>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class otp_generated extends \core\event\base {
+
+    protected static $crud = 'c';
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function init() {
+        $this->data['crud'] = static::$crud; 
+        $this->data['edulevel'] = self::LEVEL_OTHER;
+        $this->context = \context_system::instance();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public static function get_name() {
+        return get_string('eventotp'.substr(static::class, strrpos(static::class, '_') + 1),
+            'auth_emailotp');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function get_description() {
+        return sprintf('Password %s for \'%s\'', $this->action,
+            $this->other['email']);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function get_legacy_logdata() {
+        return array(SITEID, 'auth_emailotp', $this->action, '',
+            $this->other['email']);
+    }
+
+    /**
+     * Custom validation.
+     *
+     * @throws \coding_exception
+     */
+    protected function validate_data() {
+        parent::validate_data();
+        if (!isset($this->other['email'])) {
+            throw new \coding_exception('The \'email\' value must be set in other.');
+        }
+    }
+
+    public static function get_other_mapping() {
+        return false;
+    }
+}
diff --git a/classes/event/otp_revoked.php b/classes/event/otp_revoked.php
new file mode 100644
index 0000000..14001a6
--- /dev/null
+++ b/classes/event/otp_revoked.php
@@ -0,0 +1,38 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Event when one-time password is revoked.
+ *
+ * @package    auth_emailotp
+ * @copyright  2020 Pawel Suwinski <psuw@wp.pl>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace auth_emailotp\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Event when one-time password is revoked.
+ *
+ * @package    auth_emailotp
+ * @copyright  2020 Pawel Suwinski <psuw@wp.pl>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class otp_revoked extends otp_generated {
+    protected static $crud = 'd';
+}
diff --git a/lang/en/auth_emailotp.php b/lang/en/auth_emailotp.php
index f4476ab..6b87c64 100644
--- a/lang/en/auth_emailotp.php
+++ b/lang/en/auth_emailotp.php
@@ -23,20 +23,22 @@
  */
 
 $string['pluginname'] = 'Email OTP';
+$string['eventotpgenerated'] = 'Password generated';
+$string['eventotprevoked'] = 'Password revoked';
 $string['otpgeneratedsubj'] = 'One-time password';
 $string['otpgeneratedtext'] = 'One-time password for current session: {$a->password}';
 $string['otpsentsuccess'] = 'One-time password was sent to given email.';
 $string['otpsenterror'] = 'An error occurred while sending one-time password.';
 $string['otpsentinfo'] = 'One-time password for current session was already generated and sent to email.';
-$string['otpinvalidated'] = 'Previously generated password has been revoked due to exceeding the login failure threshold.';
-$string['optperioderror'] = 'Minim period after which another password can be generated not preserved. Try again later.';
+$string['otprevoked'] = 'Previously generated password has been revoked due to exceeding the login failure threshold.';
+$string['otpperioderror'] = 'Minim period after which another password can be generated not preserved. Try again later.';
 $string['revokethreshold'] = 'Revoke threshold';
 $string['revokethreshold_help'] = 'Login failures limit causing revoke of the generated password (0 - unlimited).';
 $string['minrequestperiod'] = 'Minium period';
 $string['minrequestperiod_help'] = 'A time in seconds after which another password can be generated.';
 $string['fieldsmapping'] = 'User profile fields mapping';
 $string['fieldsmapping_pattern'] = 'Pattern';
-$string['fieldsmapping_pattern_help'] = 'Capturing groups PCRE patttern.';
+$string['fieldsmapping_pattern_help'] = 'Capturing groups PCRE pattern.';
 $string['fieldsmapping_mapping'] = 'Mapping';
 $string['fieldsmapping_mapping_help'] = 'Mapping expressions.';
 $string['fieldsmapping_help'] = <<<'EOT'
diff --git a/lang/pl/auth_emailotp.php b/lang/pl/auth_emailotp.php
index f1a8863..f1e55e5 100644
--- a/lang/pl/auth_emailotp.php
+++ b/lang/pl/auth_emailotp.php
@@ -23,13 +23,15 @@
  */
 
 $string['pluginname'] = 'Email OTP';
+$string['eventotpgenerated'] = 'Hasło wynegerowano';
+$string['eventotprevoked'] = 'Hasło unieważniono';
 $string['otpgeneratedsubj'] = 'Hasło jednorazowe';
 $string['otpgeneratedtext'] = 'Hasło jednorazowe dla bieżącej sesji: {$a->password}';
 $string['otpsentsuccess'] = 'Hasło jednorazowe zostało wysłane na podany adres email.';
 $string['otpsenterror'] = 'Wystąpił błąd podczas wysyłania hasła jednorazowego.';
 $string['otpsentinfo'] = 'Hasło jednorazowe dla bieżącej sesji już zostało wygenerowane i wysłane.';
 $string['otpinvalidated'] = 'Poprzednio wygenerowane hasło zostało unieważnione z powodu przekroczenia limitu niepoprawnych logowań.';
-$string['optperioderror'] = 'Nie zachowany minimalny odstęp, po którym kolejne hasło może być wygenerowane. Spróbuj ponownie później.';
+$string['otpperioderror'] = 'Nie zachowany minimalny odstęp, po którym kolejne hasło może być wygenerowane. Spróbuj ponownie później.';
 $string['revokethreshold'] = 'Próg nieważnienia';
 $string['revokethreshold_help'] = 'Limit nieudanych logowań unieważniających wygenerowane hasło (0 - bez limitu).';
 $string['minrequestperiod'] = 'Minimalny odstęp';