OWNE operate using a very simple classification system to help categorise any and all reported hauntings and supernatural events. This system does not state that these entities exist categorically as supernatural entities, rather it describes types of ghost described as having been experienced - a subtle difference but a very important one. What must be remembered is that the majority of reported paranormal experiences have a perfectly mundane explanation, though sometimes those explanations aren't instantly recognisable. From man-made electromagnetic fields, infra sound affecting the inner ear, water pipes banging in the walls, to psychological trauma, physical defects and conditions, all can have a subtle effect on the human perception, often leading to erroneous conclusions.

The OWNE Entity Classification System has been put in place to allow the investigation team to 'pigeonhole' specific sightings and experiences, for ease of reporting.

Class I ~ Restligeists: The term derives from the German "restlich" meaning 'residual', and "Geist", meaning 'ghost' or 'spirit'. This phenomenon describes those encounters which seem to be a snapshot of time, much like a recording. Also known as 'stone tape recordings' or 'residual hauntings'.

Class II ~ Poltergeists: The term derives from the German 'poltern' meaning 'to make noise', and 'Geist', meaning "ghost" or "spirit". This phenomenon is often segregated from other ghostly activity due to its more insidious nature.

Class III ~ Shadow People: 'Shadow People' are allegedly shadowy supernatural forms that take on human aspects. The 'shadow people' phenomena is a modern take on the classic ghost.

Class IV ~ Hauntings: A 'haunting' usually centres around a building or room within a building, and has a range of phenomena rather than concentrating on a single type, from apparitions, to sounds, smells and reports of being touched.

Class V ~ Crisis Apparitions: Crisis Apparitions are among the rarest of phenomena experienced in modern times. The phenomena usually surrounds and only occurs to a single person, and is linked with times of crisis (such as an impending accident) as the name suggests.

Class VI ~ Religious Entities: Religious Entities are those alleged supernatural sightings of beings classified by religious doctrine: demons, angels etc.