For peace of mind you should look for a therapist who is registered with any one of the the following organisations:
- British Association for Counselling and Psychotherapy (BACP).
- United Kingdom Council for Psychotherapy (UKCP).
- Association for Counselling and Therapy Online (ACTO).
- The National Counselling Society (NCS).
All the above organisations set the professional standards and training requirements for their members and are there to protect you should you ever need to make a complaint. There are also specific organisations for clinical psychologists etc.
The Counselling Directory also lists verified therapists who are members of the above organisations.
It is really important that you find a therapist you feel safe and comfortable working with. Go with your ‘gut instinct’. If that person doesn’t feel right then find someone else who you feel you can trust.