A major security operation is beginning across the North today to ensure the replacement of £240 million worth of notes from the Northern Bank goes smoothly.
A command room has been set up in Belfast and extra police resources are being deployed throughout the North to oversee the operation at 95 branches in the wake of last December's record £26.5 million robbery from the bank's headquarters.
Members of the public have been urged to be on their guard against criminals trying to exploit the situation as old Northern Bank money is exchanged for notes with a new design produced in a bid to prevent the stolen money being used.
Last week the Northern Bank revealed that all £10, £20, £50 and £100 notes would be replaced today with notes with a new logo and different colour. The serial numbers on the notes will also be changed.
Members of the public have been urged to contact the police if someone purporting to be from the Northern Bank calls at their home offering to collect money. They were also asked to ensure older relatives and friends are accompanied to the bank with cash.
People were also advised not to immediately rush to Northern Bank branches today to have their notes replaced as the operation will run for several weeks.
During the replacement period, old notes can still be used in the normal way in shops, restaurants, bars and for paying for services. If there is a queue outside the bank, people are advised not to wait but to return to that branch another day.