The licensee of a shop where a staff member was caught out serving alcohol to a 16-year-old said it was a one off human error.
Police worked with trading standards and two 16-year-old volunteers to conduct a test purchase operations in the area, looking at the sale of alcohol and tobacco.
The tests took place on Saturday, May 10, and officers say Euro Booze and Foods Ltd in West Street, Boston, sold alcohol to a volunteer.
A member of staff was fined £90 for the sale and the licence holder will be invited to a meeting to discuss the issue of underage sales.
Licensee Erhan Akyuz said he had worked hard to avoid selling alcohol to under 16s since opening the business on London Road, six years ago, and taking over the West Street shop a year ago.
He said he had worked hard to ensure both sites do not serve underage drinkers.
He added: “This is the first time one of our workers made a mistake.
“He’s been here more than a year now, I gave him a warning and hopefully it will never happen again.
“I’ve never had a problem before because we always ask customers if they look under 25.
“Everybody is a human being and we all make mistakes one way or another.”
European Beer/Ambersea in Witham Place, Boston, passed the test.
Euro Booze and Foods will be subject to a further test in the next three months.
Licensing officer PC Ian Figgitt said test purchase operations were intelligence led and involved premises where information has been received that staff are selling products to underage people.
He said: “On the receipt of such information, the people running the shops, pubs, bars or clubs are sent letters advising them that this information has been received to enable them to check their staff and ensure they are not selling or to stop them selling.
“They are advised that the premises will be tested and invited to discuss any concerns or issues they may have identified following our initial warning communication.”