diff --git a/Web/Presenters/CommentPresenter.php b/Web/Presenters/CommentPresenter.php
index c114ba5d..1511aef4 100644
--- a/Web/Presenters/CommentPresenter.php
+++ b/Web/Presenters/CommentPresenter.php
@@ -41,9 +41,14 @@ final class CommentPresenter extends OpenVKPresenter
 
         if($entity instanceof Topic && $entity->isClosed())
             $this->notFound();
+
+        if($entity instanceof Post && $entity->getTargetWall() > 0)
+            $club = (new Clubs)->get(abs($entity->getTargetWall()));
+        else if($entity instanceof Topic)
+            $club = $entity->getClub();
         
         $flags = 0;
-        if($this->postParam("as_group") === "on")
+        if($this->postParam("as_group") === "on" && !is_null($club) && $club->canBeModifiedBy($this->user->identity))
             $flags |= 0b10000000;
 
         $photo = NULL;
diff --git a/Web/Presenters/TopicsPresenter.php b/Web/Presenters/TopicsPresenter.php
index 5fb8eaff..f29c7979 100644
--- a/Web/Presenters/TopicsPresenter.php
+++ b/Web/Presenters/TopicsPresenter.php
@@ -80,7 +80,7 @@ final class TopicsPresenter extends OpenVKPresenter
                 $this->flashFail("err", tr("failed_to_create_topic"), tr("no_title_specified"));
 
             $flags = 0;
-            if($this->postParam("as_group") === "on")
+            if($this->postParam("as_group") === "on" && $club->canBeModifiedBy($this->user->identity))
                 $flags |= 0b10000000;
 
             $topic = new Topic;
diff --git a/Web/Presenters/WallPresenter.php b/Web/Presenters/WallPresenter.php
index 0e2f95f2..acb8f633 100644
--- a/Web/Presenters/WallPresenter.php
+++ b/Web/Presenters/WallPresenter.php
@@ -197,7 +197,7 @@ final class WallPresenter extends OpenVKPresenter
         }
         
         $flags = 0;
-        if($this->postParam("as_group") === "on")
+        if($this->postParam("as_group") === "on" && $wallOwner instanceof Club && $wallOwner->canBeModifiedBy($this->user->identity))
             $flags |= 0b10000000;
         if($this->postParam("force_sign") === "on")
             $flags |= 0b01000000;