Police are advising people to check details of phone callers before providing them with any personal information.
The warning comes after a number of doctors’ surgeries received a phone call from a person claiming to represent North Wales Police.
The caller was asking the surgeries for money to have an advert in a campaign leaflet.
Chief Inspector Andy Williams said: “If anyone calls stating they are an official from any company or public service, people should ensure they check they are happy who they are speaking to.”
People are also advised to ask for a number on which they can ring the caller back.
North Wales Police are not currently seeking any advertisements for any campaigns.