diff --git a/src/application/controller/api/post/add.php b/src/application/controller/api/post/add.php
index 0a9609a..875d2ba 100644
--- a/src/application/controller/api/post/add.php
+++ b/src/application/controller/api/post/add.php
@@ -7,22 +7,17 @@ $response = [
 
 if (isset($_SESSION['userName'])) {
 
-  if (!isset($_POST['message']) || (isset($_POST['message']) && !Valid::userPost($_POST['message']))) {
+  if (!$userPosts = $_twister->getPosts([$_SESSION['userName']], 1)) {
 
     $response = [
       'success' => false,
-      'message' => _('Post message must contain from 1 to 140 chars')
-    ];
-
-  } else if (!$userPosts = $_twister->getPosts([$_SESSION['userName']], 1)) {
-
-    $response = [
-      'success' => false,
-      'message' => _('Could not receive user post')
+      'message' => _('Could not receive last user post')
     ];
 
   } else if (isset($userPosts[0]['userpost']['k']) &&
-             $result = $_twister->newPostMessage($_SESSION['userName'], Filter::int($userPosts[0]['userpost']['k']) + 1, $_POST['message'])) {
+             $result = $_twister->newPostMessage($_SESSION['userName'],
+                                                 Filter::int($userPosts[0]['userpost']['k']) + 1,
+                                                 Filter::post($_POST['message']))) {
 
     $response = [
       'success' => true,
diff --git a/src/system/helper/valid.php b/src/system/helper/valid.php
index fa96b19..24fabc2 100644
--- a/src/system/helper/valid.php
+++ b/src/system/helper/valid.php
@@ -2,21 +2,6 @@
 
 class Valid {
 
-  public static function userPost(string $userPost) {
-
-    $length = mb_strlen($userPost);
-
-    if ($length < 1 || $length > 140) {
-
-      return false;
-
-    } else {
-
-      return true;
-
-    }
-  }
-
   public static function base64(string $string) {
 
     if (base64_encode(base64_decode($string, true)) === $string) {