A study of internet STI testing sites from the United States has found that the quality is variable and often poor.The authors state their concern that the quality of STI testing services was often poor and called for national regulatory control of quality to protect customers from receiving inaccurate results. However, they do not dismiss entirely the advantage of properly regulated internet-based STI testing services in a broader strategy to encourage more testing for thoseat risk. 'it is of course desirable that the public are using the internet not just to source information regarding STIs but also that they are choosing to test for STIs, especially those who are too embarrassed or unwilling to attend their GP or sexual health clinic.  Internet sites that offer STI testing services and advice may be available but they are not free and are not regulated. In UK practice, it is entirely possible for patients to use internet-based services for DIY testing at home. We should advise caution if patients choose to use these services and also if they have received test results that are negative.'