A bar in Creswell is to close for a weekend after they were caught selling alcohol to underage volunteers during a test purchase operation in the North East Derbyshire area.
Viva La Mamas sold booze to the teenagers for a second time in a three month period.
They were caught during checks by Derbyshire police and trading standards, with the help of teenage volunteers, on Thursday, July 17.
Five out of the seven premises which were visited failed the test, including Viva La Mamas.
Members of staff from three other premises have been given fixed penalty notices for selling alcohol to teens, and two other licensees have been interviewed by officers.
Viva La Mamas will be closed from 4pm on Friday, August 29, until 11.30pm on Sunday, August 31.
Test purchasing operations are carried out on regular occasions throughout the county and further operations will take place across the area.