diff --git a/contao/dca/tl_member.php b/contao/dca/tl_member.php
index ab2efe4..0c18967 100644
--- a/contao/dca/tl_member.php
+++ b/contao/dca/tl_member.php
@@ -18,7 +18,8 @@
 
 // Extend the default palette
 PaletteManipulator::create()
-    ->addField(['avatar'], 'personal_legend', PaletteManipulator::POSITION_APPEND)
+    ->addField('avatar', 'personal_legend', PaletteManipulator::POSITION_APPEND)
+    ->addField('alias', 'avatar')
     ->applyToPalette('default', 'tl_member')
 ;
 
@@ -45,3 +46,10 @@
     ],
     'sql' => "binary(16) NULL"
 ];
+
+$GLOBALS['TL_DCA']['tl_member']['fields']['alias'] = [
+    'search' => true,
+    'inputType' => 'text',
+    'eval' => ['rgxp'=>'alias', 'doNotCopy'=>true, 'unique'=>true, 'maxlength'=>255, 'tl_class'=>'w50'],
+    'sql' => "varchar(255) BINARY NOT NULL default ''"
+];
diff --git a/contao/languages/de/tl_member.xlf b/contao/languages/de/tl_member.xlf
index ac692e8..b2f71ae 100644
--- a/contao/languages/de/tl_member.xlf
+++ b/contao/languages/de/tl_member.xlf
@@ -9,6 +9,14 @@
         <source>Here you can choose a profile picture for the member.</source>
         <target>Hier können Sie ein Profilbild für das Mitglied auswählen.</target>
       </trans-unit>
+      <trans-unit id="tl_member.alias.0">
+        <source>Member alias</source>
+        <target>Mitgliedsalias</target>
+      </trans-unit>
+      <trans-unit id="tl_member.alias.1">
+        <source>The member alias is a unique reference to the news item which can be called instead of its numeric ID.</source>
+        <target>Der Mitgliedsalias ist eine eindeutige Referenz, die anstelle der numerischen Mitglieds-ID aufgerufen werden kann.</target>
+      </trans-unit>
       <trans-unit id="tl_member.settings.0">
         <source>Settings</source>
         <target>Einstellungen</target>
@@ -19,4 +27,4 @@
       </trans-unit>
     </body>
   </file>
-</xliff>
\ No newline at end of file
+</xliff>
diff --git a/contao/languages/en/tl_member.xlf b/contao/languages/en/tl_member.xlf
index fade756..ba70a93 100644
--- a/contao/languages/en/tl_member.xlf
+++ b/contao/languages/en/tl_member.xlf
@@ -7,6 +7,12 @@
       <trans-unit id="tl_member.avatar.1">
         <source>Here you can choose an avatar for the member.</source>
       </trans-unit>
+      <trans-unit id="tl_member.alias.0">
+        <source>Member alias</source>
+      </trans-unit>
+      <trans-unit id="tl_member.alias.1">
+        <source>The member alias is a unique reference to the news item which can be called instead of its numeric ID.</source>
+      </trans-unit>
       <trans-unit id="tl_member.settings.0">
         <source>Settings</source>
       </trans-unit>
@@ -15,4 +21,4 @@
       </trans-unit>
     </body>
   </file>
-</xliff>
\ No newline at end of file
+</xliff>
diff --git a/src/EventListener/DataContainer/MemberFieldsListener.php b/src/EventListener/DataContainer/MemberFieldsListener.php
new file mode 100644
index 0000000..a8f7bdb
--- /dev/null
+++ b/src/EventListener/DataContainer/MemberFieldsListener.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace Oveleon\ContaoMemberExtensionBundle\EventListener\DataContainer;
+
+use Contao\CoreBundle\DependencyInjection\Attribute\AsCallback;
+use Contao\Database;
+use Contao\DataContainer;
+use Contao\MemberModel;
+use Contao\System;
+use Exception;
+
+class MemberFieldsListener
+{
+    /**
+     * @throws Exception
+     */
+    #[AsCallback(table: 'tl_member', target: 'fields.alias.save')]
+    public function generateAlias($varValue, DataContainer $dc): string
+    {
+        $aliasExists = static function (string $alias) use ($dc): bool {
+            $result = Database::getInstance()
+                ->prepare("SELECT id FROM tl_member WHERE alias=? AND id!=?")
+                ->execute($alias, $dc->id);
+
+            return $result->numRows > 0;
+        };
+
+        if (!$varValue)
+        {
+            $varValue = $dc->activeRecord->firstname . '_' . $dc->activeRecord->lastname . ($aliasExists ? '_' . $dc->activeRecord->id : '');
+        }
+        if (preg_match('/^[1-9]\d*$/', $varValue))
+        {
+            throw new Exception(sprintf($GLOBALS['TL_LANG']['ERR']['aliasNumeric'], $varValue));
+        }
+        elseif ($aliasExists($varValue))
+        {
+            throw new Exception(sprintf($GLOBALS['TL_LANG']['ERR']['aliasExists'], $varValue));
+        }
+
+        return $varValue;
+    }
+}
diff --git a/src/Member.php b/src/Member.php
index c8d1065..ebe775c 100644
--- a/src/Member.php
+++ b/src/Member.php
@@ -56,7 +56,6 @@ public static function processAvatar(?MemberModel $objMember, ?array $arrData):
             return;
         }
 
-        // ToDo: remove $_SESSION when contao 4.13 support ends (Contao ^5.* is not possible with Contao 4.* support)
         $maxlength_kb = FileUpload::getMaxUploadSize();
         //$maxlength_kb_readable = System::getReadableSize($maxlength_kb);