Between 1993 and 1997, clinicians from 9 departments of genitourinary medicine (GUM) and one department of sexual health in East Anglia met to audit the process of contact tracing in chlamydial infection. After defining the target group, standards were set for discussion of the diagnosis with the index patient, appropriate treatment of the condition and documented notification of partners. Data were collected for all patients with confirmed chlamydial infection during the periods January to March 1995 and 1996. Considering the combined data for both years, overall 97% of patients were informed of the diagnosis and 100% received appropriate treatment. Notification of partners was addressed at the initial consultation in 99% of cases and again at follow-up in 87%. Where contacts were traceable, there was confirmation that assessment had occurred in 65%, and the index cases reported that 66% had undergone assessment. The achievements and also the problems associated with this audit are discussed.