When you buy and register a domain through Google Domains, you must be signed in to a Google Account that you’ll use to manage your domain.
As part of the registration process, you provide a registrant name and email address to list in WHOIS, as required by ICANN. This email address also must be verified when you register the domain name or change its contact info. Due to ICANN requirements, we can’t rely solely on your Google Account sign-in. We must validate the registrant email address through a verification email sent to you. Learn how to verify your domain registration.
You can use the same account as both the domain’s manager and contact. If you use different accounts, you must monitor them both, since Google Domains notifications may be sent to one or both email addresses.