According to Out-Law.com this morning:
Companies have to provide a means of contact on their websites in addition to their postal and email addresses, the European Court of Justice has ruled. A telephone number, or a contact form that is answered within 60 minutes, were deemed acceptable.
This holding flows from the E-Commerce Directive, which says that companies:
. . . [more]
“shall render easily, directly and permanently accessible to the recipients of the service and competent authorities, at least the following information:
(a) the name of the service provider;
(b) the geographic address at which the service provider is established;