A supplier admin user can define the checks included in the trade account applications by going to Profile menu >Account rules and scroll down to Trade References. Here you can change from the default zero checks to up to 4 trade references.
You can also choose to outsource your trade reference checking to TRM ( Total Risk Management) for $10 per check - just click on Yes to 'complete my checks' question & the system will prompt you for credit card info ( if not already added).
Furthermore a supplier user with tailored permissioning is able to switch on ID checks at the point of sending an trade account invite.