Dignitas is a Swiss non-profit members' society providing assisted/accompanied suicide to those members of the organisation who suffer from terminal illness and/or severe physical and/or mental illnesses, supported by (of the organization independent) qualified Swiss doctors. They have helped over 2,100[1] people die at home within Switzerland and at Dignitas' house/flat near Zürich. Additionally, they do advisory work on palliative care, health care advance directive and suicide attempt prevention and they have been leading and supporting numerous court cases and legislation projects for right-to-die laws around the world.[2] Members of Dignitas who wish for an assisted suicide have to be of sound judgement, themselves able to do the last act which brings about death, and submit a formal request including a letter explaining their wish to die and most of all medical reports showing diagnosis and treatments tried. For people with severe psychiatric illnesses, additionally, an in-depth medical report prepared by a psychiatrist that establishes the patient's condition, is required as to a Swiss Supreme Court decision.

https://en.wikipedia.org/wiki/Dignitas_(Swiss_non-profit_organisation)
http://www.dignitas.ch/?lang=en