The objective of this study was to examine whether an easy to apply no‐show policy can substantially reduce no‐show behavior of 16–25‐year‐old clients undergoing individual outpatient treatment at a community mental health center. After introduction of the new no‐show policy, the no‐show percentage was significantly reduced with 32.1%. This reduction was not due to terminating significantly more treatments of clients with no‐show behavior. It seems likely that this easy‐to‐apply no‐show policy can substantially reduce no‐show behavior of clients with a broad variety of mental disorders undergoing individual outpatient treatment.