Registrant information for domain names must to be kept accurate and up to date. For example according ICANN (Internet Corporation for Assigned Names and Numbers):
“At least annually, a registrar must present to the registrant the current Whois information, and remind the registrant that provision of false Whois information can be grounds for cancellation of their domain name registration. Registrants must review their Whois data, and make any corrections“
Read the full ICANN policy here: http://www.icann.org/en/resources/registrars/consensus-policies/wdrp
Nominet, who are the UK Domains authority have similar regulations, this excerpt is an example:
“..give and keep us notified of your correct name, postal address and any phone, fax or e-mail information and those of your contacts (if you appoint any, see condition 5.2). This duty includes responding quickly and correctly to any request from us to confirm or correct the information on the register“
Read the Nominet terms here: http://www.nominet.org.uk/uk-domain-names/registering-uk-domain/legal-details/terms-and-conditions-domain-name-registration\r\n
So it is important to keep your domain information up to date. If you have any changes you wish to make to any of your domains that Blazer Systems act as an agent for, you can update the WHOIS data by contacting is here.