diff --git a/CHANGELOG.md b/CHANGELOG.md
index 860d20af5..a39e86e8b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@
 - Added ability to set country name manually [\#1652](https://github.com/torrentpier/torrentpier/pull/1652) ([belomaxorka](https://github.com/belomaxorka))
 - Improved BitTorrent clients ban functionality [\#1657](https://github.com/torrentpier/torrentpier/pull/1657) ([belomaxorka](https://github.com/belomaxorka))
 - Improved `filelist.php` [\#1586](https://github.com/torrentpier/torrentpier/pull/1586) ([belomaxorka](https://github.com/belomaxorka))
+- Invites: Permanent invites feature [\#1670](https://github.com/torrentpier/torrentpier/pull/1670) ([belomaxorka](https://github.com/belomaxorka))
 - Demo mode: Save user language in cookies [\#1584](https://github.com/torrentpier/torrentpier/pull/1584) ([belomaxorka](https://github.com/belomaxorka))
 - BBCode: Fixed relative links working [\#1613](https://github.com/torrentpier/torrentpier/pull/1613) ([belomaxorka](https://github.com/belomaxorka))
 - Fixed incorrect page width on mobile devices [\#1653](https://github.com/torrentpier/torrentpier/pull/1653) ([belomaxorka](https://github.com/belomaxorka))
diff --git a/library/config.php b/library/config.php
index 629f86e02..6c2e55f0b 100644
--- a/library/config.php
+++ b/library/config.php
@@ -406,10 +406,12 @@ $bb_cfg['invites_system'] = [
     'codes' => [
         // Syntax: 'invite_code' => 'validity_period'
         // The 'validity_period' value is based on strtotime() function: https://www.php.net/manual/en/function.strtotime.php
+        // You can also create a permanent invite, set 'permanent' value for 'validity_period'
         // Invite link example: site_url/profile.php?mode=register&invite=new_year
-        'new_year' => '2022-12-31 00:00:01',
-        'ein_volk' => '29 July 1936',
-        'catch_up_overtake' => '1917-10-09'
+        'new_year2023' => '2022-12-31 00:00:01',
+        '340c4bb6ea2d284c13e085b60b990a8a' => '12 April 1961',
+        'tp_birthday' => '2005-04-04',
+        'endless' => 'permanent'
     ]
 ];
 $bb_cfg['password_symbols'] = [
diff --git a/library/includes/ucp/register.php b/library/includes/ucp/register.php
index 74d8a58c0..372df7dff 100644
--- a/library/includes/ucp/register.php
+++ b/library/includes/ucp/register.php
@@ -207,8 +207,10 @@ foreach ($profile_fields as $field => $can_edit) {
                 $invite_code = $_POST['invite_code'] ?? '';
                 if ($submit) {
                     if (isset($bb_cfg['invites_system']['codes'][$invite_code])) {
-                        if (TIMENOW > strtotime($bb_cfg['invites_system']['codes'][$invite_code])) {
-                            $errors[] = $lang['INVITE_EXPIRED'];
+                        if ($bb_cfg['invites_system']['codes'][$invite_code] !== 'permanent') {
+                            if (TIMENOW > strtotime($bb_cfg['invites_system']['codes'][$invite_code])) {
+                                $errors[] = $lang['INVITE_EXPIRED'];
+                            }
                         }
                     } else {
                         $errors[] = $lang['INCORRECT_INVITE'];