2. When registering a domain name, it depends on which domain name company is registered. At this time, the account and password must be registered in the domain name registration agency. This account and password are used to manage domain names in the future. As long as people know this account and password, they can manage the domain name.
3, it depends on whether the domain name registrant and contact information are written for you. If so, of course. If not, only that person can negotiate or complain.