A system, method, and computer program product determine when a user's mobile device has left a secured physical site, such as a house or office, without predefined site security settings being met, and responsively inform the user of any security anomalies. A predetermined distance threshold is compared with the distance between the mobile device, and a secured site. If the distance exceeds the threshold and a trigger event is detected, an alert is transmitted. The alert may be transmitted via the internet, and may be formatted as a text message, a phone vibration, a popup alert, a ringtone, an audio recording, a synthesized voice message, an image, and a video. The alert may be delivered via a speaker in a vehicle or a mobile phone, and an alert format is selected according to whether these are in use.