The identity information of some domains is hidden. This is referred to as domain whois protection. In order to reach the owners or financial or technical managers of domains with whois protection, it is necessary to notify the proxy address that assumes the confidentiality of whois information. Every whois protection service provider is obliged by ICANN rules to deliver the notifications transmitted through it to the real owner of the domain whose identity it conceals. Since the declaration is accepted as the basis for this obligation, the accuracy and timeliness of the contact information to reach the real owner of the domain names whose whois information is hidden is primarily the responsibility of the owner of the relevant domain.