Detectives are urging the public to be extra vigilant following a recent scam in which the caller claimed to be a police officer.
The reminder comes after police were alerted this week that a woman, in east Belfast, had been tricked into parting with a sum of money.
Detective Chief Inspector Ian Wilson said: "In this case, a woman - aged in her 70s - was persuaded to hand over her bank card, bank details, and a sum of money by an imposter who, via telephone, claimed to be a police officer."
"I'm keen to, first of all, stress that police will never ask for your bank details, or money. Never allow any unauthorised person to have access to such details.