A method for authorizing a single action by a plurality of users at a site may include registering each of the users and at least one mobile communication device associated with that user with an authorization module, identifying the mobile communication device by a unique hardware identification number. The method may also include associating each of the users and the mobile communication device associated with that user with the site by the authorization module. The method may further include requesting each of the users to confirm the action by sending a confirmation request from the site to the mobile communication device associated with that user by the authorization module. The method may also include authorizing the action upon receiving confirmation from the mobile communication devices of all users that are required to authorize that action.