Storing Information on User’s Devices journal article Charlotte Bagger Tranberg European Data Protection Law Review, Volume 1 (2015), Issue 2, Page 130 - 136 A recent opinion given by the Danish Business Authority states that the recording of MAC addresses of users’ mobile devices is not subject to the requirements of providing information and obtaining consents from the users under the Danish Cookie Order, which implements article 5(3) in the e-Privacy directive.