diff --git a/core/validation.md b/core/validation.md
index 70ccad8bc1c..8e401050f0c 100644
--- a/core/validation.md
+++ b/core/validation.md
@@ -421,7 +421,11 @@ class MyEntityRemoveProcessor implements ProcessorInterface
 
     public function process($data, Operation $operation, array $uriVariables = [], array $context = [])
     {
-        $this->validator->validate($data, ['groups' => ['deleteValidation']]);
+        $validationErrors = $this->validator->validate($data, groups: ['deleteValidation']]);
+        if($validationErrors->count() > 0) {
+            //trigger some error / throw some exception...for example
+            throw new ConflictHttpException($errors->get(0)->getMessage());
+        }
         $this->doctrineProcessor->process($data, $operation, $uriVariables, $context);
     }
 }