In order to change information about a domain name Registrant you should enter the corresponding changes into Rucenter database:
Changing domain name Registrant's contact information in the Registrant object
Registrant's contact information includes: telephone number, fax number, e-mail addresses and postal address. Changes are entered on Rucenter's Web-server in your personal account.
The order of changing contact information:
Changing Registrant's identification information in the Agreement
Registrant's identification information includes: company name, legal address, TIN, full name, passport data, date of birth. Changing the identification information is made under the Registrant's official letter to Rucenter.
Changing Registrant's identification information in the Agreement (form) will be made within 2 (two) business days from the moment Rucenter receives the Registrant's letter.