Mr McNally said a 26-year-old Taupo man was approached and bought alcohol which he supplied to the teenagers.
"He was spoken to immediately after by police and as a result faces an appearance in the Taupo District Court to answer a charge of purchasing liquor to supply a minor."
The maximum penalty for that charge is a $2000 fine.
"This operation was planned due to information received from concerned members of the Tauhara community," Mr McNally said.
"It was disappointing that this male completed the sale and supplied the volunteers, but the message must get through, supplying minors alcohol will not be tolerated ..."