In your HubSpot account, navigate to Contacts > Contacts.
Click the name of the contact you want to register.
To register the contact and their website domain as a lead, in the right panel, Lead Registration section, enter their information in the required fields and click Request registration. All known field data will be auto-populated by HubSpot.
If the status shows Registered, the lead is successfully registered.
If the status shows Unavailable, click Email Channel Account Manager to email your Channel Account Manager for more information.
If there is no status, the current contact's website domain matches an existing registered lead's website domain. Click contact to view the registered lead.