diff --git a/src/Controller/CommentController.php b/src/Controller/CommentController.php
index 920868408..7dfb23e00 100644
--- a/src/Controller/CommentController.php
+++ b/src/Controller/CommentController.php
@@ -171,6 +171,7 @@ public function addComment(
             if (
                 $commentModel->checkCommentSpam($loggedInMember, $comment)
                 || $commentModel->checkForEmailAddress($comment)
+                || $commentModel->checkForPhoneNumber($comment)
             ) {
                 $form->addError(new FormError($this->translator->trans('commentsomethingwentwrong')));
             } else {
diff --git a/src/Controller/RelationController.php b/src/Controller/RelationController.php
index 9258eb2f5..9fe19958a 100644
--- a/src/Controller/RelationController.php
+++ b/src/Controller/RelationController.php
@@ -72,15 +72,18 @@ public function add(Request $request, Member $member, Mailer $mailer): Response
         if ($form->isSubmitted() && $form->isValid()) {
             /** @var Relation $relation */
             $relation = $form->getData();
-            $relation->setOwner($loggedInMember);
-            $relation->setReceiver($member);
+            if (!checkForEmailAddress($relation) && !checkForPhoneNumber($relation))
+            {
+                $relation->setOwner($loggedInMember);
+                $relation->setReceiver($member);
 
-            $this->entityManager->persist($relation);
-            $this->entityManager->flush();
+                $this->entityManager->persist($relation);
+                $this->entityManager->flush();
 
-            $mailer->sendRelationNotification($relation);
+                $mailer->sendRelationNotification($relation);
 
-            return $this->redirectToRoute('relations', ['username' => $loggedInMember->getUsername()]);
+                return $this->redirectToRoute('relations', ['username' => $loggedInMember->getUsername()]);
+            }
         }
 
         return $this->render('relation/add.html.twig', [
@@ -235,4 +238,20 @@ private function findRelationBetween(Member $loggedInMember, Member $member): ?R
 
         return $relationRepository->findRelationBetween($loggedInMember, $member);
     }
+
+    private function checkForEmailAddress(Relation $relation): bool
+    {
+        $relationText = $relation->getCommentText();
+        $found = preg_match("/[\._a-zA-Z0-9-]+@[\._a-zA-Z0-9-]+/i", $relationText);
+
+        return $found > 0;
+    }
+
+    private function checkForPhoneNumber(Relation $relation): bool
+    {
+        $relationText = $relation->getCommentText();
+        $found = preg_match("/([0-9][\. \)-]*){8,}/", $relationText);
+
+        return $found > 0;
+    }
 }
diff --git a/src/Model/CommentModel.php b/src/Model/CommentModel.php
index 62231a352..9bb74c5cc 100644
--- a/src/Model/CommentModel.php
+++ b/src/Model/CommentModel.php
@@ -175,4 +175,12 @@ public function checkForEmailAddress(Comment $comment): bool
 
         return $count > 0;
     }
+
+    public function checkForPhoneNumber(Comment $comment): bool
+    {
+        $commentText = $comment->getTextfree();
+        $found = preg_match("/([0-9][\. \)-]*){8,}/", $commentText);
+
+        return $found > 0;
+    }
 }