Yet another con to be aware of.

[ppppenguin]

Presentation numbers where false or fake caller ID is given could in my opinion be easily stamped on. All the switching of calls is controlled by computer program. If a company wants to use a different caller ID then it should be registered through their provider.

Yes, there is a legitimate reason for Caller ID not to match the actual calling line to do with PABX systems. The phone companies make money and FCC, Ofcom and Comreg particularly believe in light touch. The UK and USA regulators will do nothing. Also some of the calls originate outside of the UK (or appear to be so to your phone company), despite the caller ID. This also is legal

The ability to set a different caller ID is by design and that genie won't go back.
Just listen, and don't say yes or no, but be committal. There is a flaw too where the originating call doesn't drop quick enough if you hang up and dial the bank's number. You'll still be on the same call! They make use of this and even simulate the dial tone! It was to accommodate extensions, so you could hang up an incoming call and lift a phone handset elsewhere.

I mentioned the legitimate PABX reason for non-matching caller ID a few posts back. For example if a UK company has an Indian call centre then it should probably display its UK switchboard number. Still doesn't excuse letting through calls with caller ID that cannot be a valid number.

As for called party cleardown, the time from the recipient replacing the handset to clearing the line has been reduced over the years. It was effectively never in the old days of Strowger switches, only the calling party could clear the line. This document shows progress:
https://www.openreach.co.uk/orpg/home/up...r00314.pdf

Cleardown on my landline is now within 5 seconds. On my mobile it's effectively instant.

I don't know what happens in Ireland and other countries.