Configure your HTML Form Adapter to validate the registration form data before allowing users to continue to the identity verification process.
The template path is: <pf_install>/pingfederate/server/default/conf/template/local.identity.registration.html. For help modifying templates, see Customizable user-facing pages in the PingFederate documentation.
Near the name fields, modify the template to tell users to "Enter the name as shown on your ID card". Users can only register with their verified name.
If your datastore has length or character requirements for passwords, for example, add validation to the password field that checks against the same criteria.