"The girls confirmed they were 16 and were then served drinks and told to have a nice day," he said.
"In my view this is a more serious offence than serving someone you believe is 18. The bar staff clearly knew they were serving 16-year-olds. I can't imagine what they were thinking," he said.
No other sales were made to minors in the operation, which visited 34 licensed premises in Nelson, Richmond and Motueka.