There is one exception I know of to the “EFTPOS is separate from the POS terminal” rule – credit cards can be accepted via a software solution that uses a standard magstripe reader, and requires signature (not PIN) as authentication. Crown use this in some of their bars.

I guess I could have worded it better – when I meant to get across is that the demarcation between client device and card reader is very defined.

I’ve since clarified that the EFTPOS terminal either prints the receipt or returns the information needs to print a receipt back to the client via the data connection. The demarcation would also mean that the client device (eg: Myki machine) never communicates with the bank directly, or sees the PIN entered by the user.

In the case of an EFTPOS terminal that passes the receipt via the data connection, the logic in the client can either send it to the printer or throw it away – just like the supermarket self checkout example.