"Regardless of whether it is the witness who contacts the investigator seeking assistance or the investigator who approaches the owner or representative of a location that they are interested in investigating, foremost must be the ethical treatment of all those involved."
From the Guidance Notes for Investigators of Spontaneous Cases: Apparitions, Hauntings, Poltergeists and Similar Phenomena. Published by the Society for Psychical Research (2018).
Each of us fully support and endorse the ethical practices contained within the above publication. We strongly urge that every investigator regardless of their methodology or belief, also adopt these guidelines and apply them in every investigation.