Alcohol purchase surveys were undertaken as part of two New Zealand community action projects (one in a large metropolitan area and one in a small town) that aimed at reducing alcohol consumption-related harm for young people. Baseline surveys in both places indicated poor age verification practices. The two follow-up surveys in the metropolitan area showed a decrease in sales made without age identification between 2002 (60%) and 2003 (46%). However, an increase between 2003 (46%) and 2004 (55%) occurred. In the metropolitan area, regulatory staff in three out of seven jurisdictions increased enforcement due to the 2002 survey and follow-up work; this did not happen following the 2003 survey. In the small town, results indicated positive changes in verification practices over time. In addition, licensee meetings, host responsibility training, and a regional project all occurred following the surveys. The surveys have also had important indirect effects. Closer monitoring and enforcement activity due to the surveys has contributed to the amendment of alcohol legislation in New Zealand.