Abstract: An embodiment of an intelligent personal device detachment sensor apparatus and system for a lanyard, belt clip, pocket clip, or other worn device for displaying a security device, such as an identification and/or card or badge on an individual user. The device is particularly useful for monitoring the presence of the card, badge or other small asset, with many of such assets employed at security, environmental clearance, and access checkpoints. The apparatus consists of two parts, a user holder and an asset holder, held to one another in a “docked” condition using a permanent magnet of the asset holder attachable to a permanent magnet on the user holder. The user holder has a switch (e.g., a mechanical switch), an alarm device to produce an audible signal to the user, and a transmitter that transmits an alert through a network.