Three people have been arrested in Newry after staff at a building society contacted police about an attempted transaction which roused their suspicions.
The PSNI were alerted on Friday after a customer attempted to make a very large cash withdrawal.
Detective Inspector Keon said the branch staff used banking protocol legislation to ask a number of questions.
“The customer, a vulnerable older person, was accompanied by three adults who staff believed were exhibiting controlling behaviours,” said the senior detective.
“We are grateful that these staff notified us straight away, allowing us to take the necessary action while the customer was still on the premises.
“Officers attended the scene and carried out a number of enquiries.”
Three people – two men aged 68 and 42, and a woman aged 69 – were arrested on suspicion of attempting to obtain property by deception, and possession of articles for use in fraud.
They were later further arrested on suspicion of kidnapping, human trafficking and fraud by false representation.
They remained in custody on Saturday afternoon.
“The banking protocol is a UK-wide initiative through which branch staff in financial institutions may enquire about financial transactions such as deposits, cash withdrawals or payment transfers, with the aim of protecting customers from financial crime,” said DI Keon.
“The banking protocol sees financial institutions and the police working in partnership to safeguard the public and protect their money.
“We are committed to doing everything we can to prevent and reduce the number of financial crimes committed, particularly against older persons.
“Regardless of where you complete financial transactions, staff are there to help if you have any worries or concerns. Consumers and businesses can report financial crime to Action Fraud on 0300 123 2040 or the PSNI on 101.”