All domains have a number of contact details on them, these are generally the contact details of the company or individual that owns them and possibly their IT technicians or website providers. It is legally required to submit this information.
All types of domains have both a "registrant" contact and an "admin" contact. The registrant contact is the owner of the domain and in the case of all domains registered by it’seeze is set to the customer. The "admin" contact address is the address of the company or individual in charge of the technical maintenance of the domain name, in this case it’seeze.
In addition to these two contact details, all domains other than .co.uk’s have a further two contact details, these are the "technical" and "billing" contacts. The "technical" contact is essentially a duplicate of the "admin" contact while the "billing" contact is set to whoever is responsible for paying for domain renewals.