This study examined change in symptoms of problem gambling among participants of a self-exclusion program in British Columbia, Canada. Within the first six months of the program, many participants were able to reduce their problem gambling symptoms. The greatest reduction was observed for those who stopped gambling completely and those who gambled informally outside the casino. Participants who tried to violate their exclusion had a smaller reduction in problem gambling symptoms. Unfortunately, many participants who tried to violate their exclusion were successful. Gambling venues need to be stricter about identifying program violators. Future research is also needed to study the characteristics of gamblers who can gamble informally without re-triggering symptoms of problem gambling.