diff --git a/src/Bundle/ChillActivityBundle/Entity/Activity.php b/src/Bundle/ChillActivityBundle/Entity/Activity.php
index 0a344236c..d740f5fe4 100644
--- a/src/Bundle/ChillActivityBundle/Entity/Activity.php
+++ b/src/Bundle/ChillActivityBundle/Entity/Activity.php
@@ -35,6 +35,7 @@ use Symfony\Component\Security\Core\User\UserInterface;
 use Symfony\Component\Serializer\Annotation\DiscriminatorMap;
 use Symfony\Component\Serializer\Annotation\Groups;
 use Symfony\Component\Serializer\Annotation\SerializedName;
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * Class Activity.
@@ -93,6 +94,7 @@ class Activity implements AccompanyingPeriodLinkedWithSocialIssuesEntityInterfac
 
     /**
      * @ORM\ManyToMany(targetEntity="Chill\DocStoreBundle\Entity\StoredObject", cascade={"persist"})
+     * @Assert\Valid(traverse=true)
      */
     private Collection $documents;
 
diff --git a/src/Bundle/ChillPersonBundle/Entity/AccompanyingPeriod/AccompanyingPeriodWorkEvaluationDocument.php b/src/Bundle/ChillPersonBundle/Entity/AccompanyingPeriod/AccompanyingPeriodWorkEvaluationDocument.php
index b31225df1..fd3e43e58 100644
--- a/src/Bundle/ChillPersonBundle/Entity/AccompanyingPeriod/AccompanyingPeriodWorkEvaluationDocument.php
+++ b/src/Bundle/ChillPersonBundle/Entity/AccompanyingPeriod/AccompanyingPeriodWorkEvaluationDocument.php
@@ -20,6 +20,7 @@ use DateTimeInterface;
 use Doctrine\ORM\Mapping as ORM;
 use RuntimeException;
 use Symfony\Component\Serializer\Annotation as Serializer;
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * @ORM\Entity
@@ -88,6 +89,7 @@ class AccompanyingPeriodWorkEvaluationDocument implements \Chill\MainBundle\Doct
      * @Serializer\Groups({"read"})
      * @Serializer\Groups({"write"})
      * @Serializer\Groups({"accompanying_period_work_evaluation:create"})
+     * @Assert\Valid(traverse=true)
      */
     private ?StoredObject $storedObject = null;