Vishing involves criminals calling potential victims, claiming to be someone from their bank, the police, a legitimate organisation such as HMRC, a supplier or even an internal member of staff.
Fraudsters may claim that your account has been compromised, that there is suspicious activity on the account, or that a payment has been made by the business using incorrect bank details.
Criminals have been known to convince victims that the call is genuine by getting them to cross-check the incoming phone number with the official number of the bank. However, fraudsters can use technology to spoof numbers which make them appear to be coming from a genuine source.