Licensees must be aware of changes to the law that mean under-18s can no longer buy tobacco products from today (1 October).
Vending machines must carry a sign saying: "This machine is only for the use of people aged 18 or over".
The sign must be at least 60mm by 100mm with letters at least 6mm high, and be placed somewhere clearly visible to anyone using the machine.
Pubs that sell tobacco products over the counter must display a sign saying: "It is illegal to sell tobacco products to anyone under the age of 18". It must be at least A3 in size with letters at least 36mm high.
Failure to display the correct notice could mean a fine of up to £1,000, while a £2,500 fine is possible for selling tobacco products to under-18s.
Poppleston Allen solicitor Andy Grimsey advised licensees to ensure staff sign a training book, keep a register of refused sales and explain to staff that some customers aged 16 and 17 will be unhappy about the change of law.
Grimsey said: "This new legislation may not stop some 17-year-olds from having a crafty fag behind the bike shed, but it is important to ensure that you didn't provide them."