Citizens are advised to stay alert and not to disclose any personal information to anyone when receiving a phone call with unknown origin. Particularly if you receive a phone call claiming that government departments require cash transfer or remittance, it is definitely a scam. A "+" or "00" prefix will be displayed for any incoming calls from outside Macau in order for the public to easily identify the telephone calls from overseas. Since the number of a fraudulent call dialed from overseas usually changes frequently or a valid phone number may even be used for phone scams, in addition the telecom operators are not allowed to intercept the contents of the calls, it is technically difficult to identify all fraudulent phone calls solely based on the original phone numbers.
Whenever a citizen is suspected of encountering any telephone scams or other crimes, please immediately report to the police for help.