This study examined the effectiveness of a web-based program ‘Check Out’ (CO) and email counselling (EC) for problem gambling. The researchers recruited 167 participants. They randomly assigned them into CO, EC, or waitlist groups. Results revealed that those in the CO group reduced their gambling and increased their general well-being more than the waitlist group. The EC group also showed improvements in gambling. Compared to EC, the effects of CO appeared to be stronger. The CO group also reported stronger relationships with their counsellors and used the intervention for longer time. EC could perhaps be used as a first step towards more comprehensive counselling (e.g., CO alone or in combination with other therapy).