As a member of BACP (see the links section) I subscribe to their Ethical Framework, a comprehensive document which provides a number of guidelines and requirements to support practitioner integrity. However I don't think that signing a piece of paper once a year is enough.
I have designed and run workshops for counsellors addressing the ethical, clinical, legal and moral dimensions of the dilemmas that we encounter in our work. I served four years as the Vice Chair of the UKAHPP Ethics Committee and adhere to their ethical code in addition to the BACP.
I spent ten years in the Independant Practitioners Network, as part of the full member group known as Rowan, in which we regularly challenged and 'stood-by' each others practice.
I have on-going supervision, both individual and group, to support and scrutinise my process as a therapist.
I take responsibility for my clinical work and am available to be examined upon any aspect of it.
In the unlikely event that an issue crops up with a client that we are unable to resolve between us, there are options for mediation with colleagues or independant peers. In the worst case scenario you could complain to my professional body.
In twenty years plus of client work, such events have never occurred.