diff --git a/mo/web/org_certs.py b/mo/web/org_certs.py
index 42a8a0884351fef9ca543ccfb685a59f65f64f80..7c6dc6cdf4f29fef863abbfa0754c78ef0648127 100644
--- a/mo/web/org_certs.py
+++ b/mo/web/org_certs.py
@@ -80,6 +80,9 @@ class CertSetForm(FlaskForm):
     delete = wtforms.SubmitField("Smazat diplomy")
 
     def osmo_validate(self, cset) -> bool:
+        if self.delete.data:
+            return True
+
         ok = True
 
         if self.background_type.data == BackgroundType.custom and self.upload_background.data is None and not cset.background_file: