Early detection is an effective building block for the prevention of problem gambling. This study aims to identify communication-based indicators for gambling-related problems in the setting of online gambling. In the framework of as emi-structured interview, customer service employees of three online gambling operators were surveyed, to identify indicators in customer correspondence could be used as apredictor for gambling-related problems. In ac onfirmatory part of the study, we investigated to what degree these indicators are able to predict problem gambling in aprospective empirical design. An optimally parsimonious log-linear model, was able to correctly predict 76.6% of the cases. Discussed in the light of this evidence, communication-based indicators could constitute an effective component of early detection. Due to the fact that the internet offers optimal conditions for consistent monitoring and objective analysis, the suggested predictive model could be combined with other models, relying on the analysis of gambling behaviour.

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