diff --git a/openedx/core/djangoapps/user_authn/views/registration_form.py b/openedx/core/djangoapps/user_authn/views/registration_form.py
index 673d01b357b..88c3a7a8047 100644
--- a/openedx/core/djangoapps/user_authn/views/registration_form.py
+++ b/openedx/core/djangoapps/user_authn/views/registration_form.py
@@ -679,6 +679,9 @@ def _add_custom_field(self, form_desc, required=True, **kwargs):
             field_name (str): Name used to get field information when creating it.
         """
         field_name = kwargs.pop("field_name")
+        if field_name in getattr(settings, "EDNX_IGNORE_REGISTER_FIELDS", []):
+            return
+
         custom_field_dict = self._get_custom_field_dict(field_name)
         if not custom_field_dict:
             log.error("Field with name {} must have a definition dictionary.".format(field_name))