diff --git a/src/pages/form/form.tsx b/src/pages/form/form.tsx
index 9aa09d4cc..f606c6742 100644
--- a/src/pages/form/form.tsx
+++ b/src/pages/form/form.tsx
@@ -198,7 +198,8 @@ const Participation = () => {
     }
     try {
       setRequestActive(true);
-      await postParticipation(form.values);
+      const participationData = form.values.anonym === false ? { ...form.values, nickname: '' } : form.values;
+      await postParticipation(participationData);
       router.push('/form/success');
     } catch (error) {
       handleSubmitError(error);