The concept of non-engagement lies at the heart of the Assertive Outreach Team (AOT) model (Reference Stein and TestStein & Test, 1980). However, in our experience there is widespread misunderstanding within mental health services about what this term means. Apart from non-engagement, the other primary criterion for acceptance into an AOT is a diagnosis of a severe and enduring mental illness, which is likely to lead to several secondary factors, including dual diagnosis, a history of self-neglect, repeated hospital admissions, chaotic lifestyle and housing problems.

Referrers often misconstrue these criteria. They see the secondary list as having equal weight as the primary, believing that AOTs specialise in working with difficult-to-manage service users, whereas in fact there is no evidence for this (Reference BurnsBurns, 2004). Special skills of AOT staff lie in developing a good therapeutic relationship with individuals with a primary diagnosis of severe and enduring mental illness who have not engaged with the community mental health team (CMHT) at all, and this is a powerful determinant of how well a person will respond to professional input (Reference Priebe and GruytersPriebe & Gruyters, 1993).

Referring to AOT individuals with a severe mental illness who are only partially engaging with the CMHT on the grounds that these particular people are deemed chaotic (Reference BurnsBurns, 2004), high-risk and hard to manage is not risk-free. Transitions between teams are known to be times of high risk for service users (e.g. increased suicide rates in individuals moved from in-patient to out-patient care; Reference CrawfordCrawford, 2004). If AOTs accept service users who are engaging with their CMHT, they may contribute to the removal of a support network to which the person has become accustomed. It may be very difficult for service users to make the change from dealing with two or maybe three familiar individuals to as many as eight or nine unfamiliar AOT staff. Accepting inappropriate users is demoralising for members of an outreach team, who have been trained and have chosen to work with a particular, non-engaging patient group (Reference LibbertonLibberton, 2000). Not only will AOTs feel pressured to accept more such referrals, but in the process CMHTs are in real danger of becoming de-skilled.

Lastly and most importantly, individuals are likely to experience a sense of loss or rejection when transferred to an AOT with all the attendant risks of morbidity and mortality. We believe that it is vital that AOT and CMHT staff have a good, shared understanding of what is meant by the term non-engagement and that inappropriate referrals are not accepted. The Department of Health has rightly made clear that any change in emphasis to simply increase a team's number of service users by taking on people who are not suitable for AOTs should be avoided (Department of Health et al, 2005).