In an instant messaging device, a selection is received from a user, where the selection specifying a plurality of contacts to participate in an instant messaging session. At least one attribute type corresponding to the at least one intended recipient is retrieved in response to detecting a trigger event relating to a message intended for at least one recipient among the plurality of contacts. A verification operation is retrieved for each of the retrieved at least one attribute type. At least one retrieved verification operations is executed. The message is sent to the at least one intended recipient in response to successful execution of the at least one of the retrieved verification operations.