The present invention relates to managing of communication in a system, which system includes at least one user unit 100 capable of reading information from a surface 120 and communicating at least part thereof to a server 140, 150, 160, a look-up server 140, 150 storing information management rules associated with information read from the surface and at least one application server 160. The user unit 100 receives an instruction with control data from the look-up server 140, 150 and determines, based on these control data, if specific information data is allowed to be communicated by the user unit to a receiving application server in response to an instruction from an application server concerning these specific information data.