Electronic tagging is a form of surveillance which uses an electronic device (a tag) fitted to the person. It is commonly used as a form of electronically monitored punishment for people who have been sentenced to electronic monitoring by a court, or required to wear a tag upon release from prison. However, electronic tagging and monitoring is also used in healthcare settings with people with dementia and in immigration contexts in some jurisdictions. If the device is based on GPS technology, it is usually attached to a person by a probation officer, law enforcement or a private monitoring services company field officer, and is capable of tracking the wearer's location wherever there is the satellite signal to do so. Electronic monitoring tags can be also used in combination with curfews t