diff --git a/src/Faker/Provider/es_ES/Person.php b/src/Faker/Provider/es_ES/Person.php
index c433376da5..88e00b01f7 100644
--- a/src/Faker/Provider/es_ES/Person.php
+++ b/src/Faker/Provider/es_ES/Person.php
@@ -68,4 +68,22 @@ public static function suffix()
     {
         return static::randomElement(static::$suffix);
     }
+    
+    /**
+     * National Personal Identity number (DNI/NIF)
+     * 
+     * @return string on format 99999999X
+     * 
+     * @url http://es.wikipedia.org/wiki/DNI_electr%C3%B3nico_en_Espa%C3%B1a
+     * @url http://es.wikipedia.org/wiki/N%C3%BAmero_de_identificaci%C3%B3n_fiscal
+     * @url http://bulma.net/body.phtml?nIdNoticia=2248
+     */
+    public function personalIdentityNumber()
+    {
+        $number = mt_rand(100, 99999999);
+        $number = str_pad($number, 8, '0', STR_PAD_LEFT);
+        $letter = substr('TRWAGMYFPDXBNJZSQVHLCKE', $number % 23, 1);
+
+        return $number . $letter;
+    }
 }