It is all within data protection legislation.
Media captionIf the person is over 18, their ID will register with a tick on the scanner.
"It tells us right away that the person who is trying to get in that they whether they have doctored or bought one off the internet or some way they have got a false document, so therefore we are able to refuse entry on that.
"It is a good idea because there are so many bags that go missing, there's some many phones that go missing, I have had friends who have had money that has gone missing out of a bag so it probably is a good idea one."We've seen a significant reduction in any of the sort of incidents we had said Laurence Burns from Thompsons.Age is displayed on a screen beside their photograph.Image caption Laurence Burns said Thompsons had caught "quite a few underage people using false identification" since using the scanner 'Significant reduction it is currently is place in three Belfast clubs - El Divino, Eivissa and Thompsons.The problems are mainly around all the nightclubs in the city."The responsibility of the nightclub or the pub doesn't just end at its door - it is putting people out onto the street at the end of the night - quite a few of those have had a good time and they have probably had."Certainly we have caught quite a few underage people using false identification because it immediately flags up on our system with a large.Plus if a fight happens, or something is stolen, the police can request the club's data, copy of an ID or a photograph to catch the criminal.How the ID scanners work, iD is placed facedown, it is scanned - the person's photograph is taken.It costs 45 a week to rent one of the machines but the police say you can not put a price on people's safety.On Saturday night at Musgrave police station in Belfast around 40 officers are briefed on the city's hot-spots for drunk and disorderly behaviour, assaults, vandalism and any other criminal behaviour.The idea for the scanning machine came from a club in Cardiff.I accompanied the police out to Shaftesbury Square, which was full of late night revellers.Club then records all the information.The new ID scanning system is being used by club owners in the city in a bid to prevent crimes in, or outside, their establishments.Image caption Supt Nigel Goddard said "the responsibility of the night club or the pub doesn't just end at its door".Media playback is unsupported on your device.(f (f start elem_1) elem_2).Copy of their ID also taken and if they are over 18 they get a big green tick.Clubs galaxy j1 promo can also share details if someone is barred.Thefts, people queuing outside one of the clubs told me they thought it was a good idea.
A new ID scanning system is now being used in some clubs in Belfast to stop to underage drinkers getting in, and it is also hoped, to reduce crime.
It can also take a person's fingerprint, which means they don't have to bring out their ID the next time.
There are already more than 1,000 of the scanners in Britain.
The police said their relationship with clubs and bars has improved and they now have a designated licensee police officer.