Hi,

and which system table are you using? For each field you can define a custom error message and validation, so you can insert an * here, if you need.

In case validation of one field does not pass, you can see a global error message. In case users system table and custom registration form web part it is message:
"The entered values cannot be saved. Please see the fields below for details."

It can be changed in properties of web part or in the ~/CMSResource/ CMS.resx files.

Unfortunately, in the current version is not error message summary supported.

You would need to modify a custom registration form web part and add a validation.

Best regards,
Ivana Tomanickova

Best regards,
Ivana Tomanickova