If you register a domain, you are able to control most aspects of this domain:
- domain attributes (locks, privacy)
- whois data
- nameserver records (in case you use Joker.com nameservice)
In case you have access to a domain because somebody else assigned you a role ('permissions') for this domain, you only are able to modify aspects limited by this role (=> How to grant roles (= grant permissions to others)?).
Important: You are obliged to enter only valid and true address and identity information for Whois data. This is a requirement of all domain registries.