Today I started a proceeding against a website that I am interested in acquiring. As the site in question fails to provide accurate whois information - postal mail to the listed address is returned, and e-mail, phone, and fax details are not provided - I requested that the registrar cancels the domain. In so many words, inaccurate or incomplete whois data offers a pretty easy route to domain acquisition.

In that context, companies inevitably get to the point that they face the question which information to enter. I have always been reluctant to identify individuals as responsible parties if such duties were derived from a position in a corporate environment, especially as such authority could be shared by a number of individuals and be subject to employee turnover.

Unfortunately there are no clear ICANN guidelines on that matter that I could find, so after reviewing the entries of some bigger companies (e.g. Microsoft, Bank of America), it seems pretty established to use the following roles:

Registrant

Domain Administrator (this line is typically not shown if you specify that the company is the legal registrant)
Company Name
Full address
Country
Phone number (this line is typically not shown)
domains@example.com (this line is typically not shown)

Administrative Contact

Domain Administrator
Company Name
Full address
Country
Phone number
domains@example.com

Technical Contact

Host Master
Company Name
Full address
Country
Phone number
hostmaster@example.com

Make sure that these e-mail addresses are actually reviewed. There will be a lot of spam, but a good server configuration should take care of that.