Computerised ID scanners have been installed in eight pubs and clubs in the city centre in the run up to Christmas.
The scanners quickly identify fake IDs and any troublemakers who are already banned from licensed premises.
Police and venues can electronically update and share photos and details of known offenders through the devices. Some of the £28,000 partnership project was funded from money seized from criminals under the Proceeds of Crime Act
This technology will be a tremendous asset in the fight to reduce crime and disorder at night in the city.
They have already been used to good effect in Truro and Newquay where they have notably cut crime and alcohol-fuelled antisocial behaviour in the night-time economy.
By sharing information on offenders we aim to make the city centre a hostile place for troublemakers to socialise, particularly those known to us through ASBOs and drinking banning orders.
More top news
It will be a dry night for most of the region with clear skies.
Thursday evening will be wet in parts of Cornwall but this will clear and it will be a mostly dry night across the South West.
The Dame Hannah Roger's Trust has announced they will be closing their Sealey-Hayne site because of financial difficulties.