This is also now becoming less effective. The system relies on the caller leaving their names so that one can screen the call before taking the call. It will work for robocall type systems where the scammers use systems which connect to the caller when it is answered, but it will drive a behavioural change by the scammers. Scammer are starting to use Australian sounding names to try and bypass the call guardian or other screening systems (e.g. letting the answering machine answer the call to see who it is before answering) and convenience the receiver to take the call. It may work for some, but not for all…and over time potentially less. If it is mandated, it is guaranteed to be less effective.
The system also relies on the receiver making a decision to take the call. Unless one only picks up the phone to known friends and family who leave names, one potentially will miss other calls which may also be legitimate and potentially important. If one only wants to take calls from known family and friends, this is already achievable through placing contact lists in the phone. Most mobiles also have settings to only allow calls to be received from known contacts.
An effective system needs to be smart and also block the caller before it is received at the handset. Otherwise, scammers will adjust their mojo to beat the system. As outlined in other threads, the technology isn’t yet to be developed for such approaches. I suspect that any system will need some sort of unbreakable unique verification codes and may also need a multinational adoption for any success.
