A method is provided for associating a first user using a first device and a second user using a second device. The method may include receiving an invitation request from the first user; verifying, by a verification server, the invitation request; sending an invitation to the second user after verifying the invitation request; and receiving an acknowledgement from the second user to acknowledge an association between the first user and the second user. The invitation request may be identified as directed to the second user and may include at least a device token associated with at least one of the first and second devices and an identification associated with at least one of the second device and the second user.