You must enter the Registration code you received in the Confirmation email. The format is RHI + 4-digit number. Ex.RHI0785.
An email will arrive at the email with instructions to follow to change the password.
The receiving email address will be that was used in the Email - Invoice field within the "Billing Data" section.
It will be the same email address of the registered in case the registration has been made by the same attendee.