Receipt rolls, kiosks, and EFTPOS machines: what do they have in common?

I discovered something last night that I thought I would share:

If a kiosk has run out of receipt roll, and the customer attempts to pay bills via EFTPOS, they will receive an error saying something like 'printer is unavailable' (I don't remember the exact error message!) 

This is obviously to guarantee that the customer will receive a transaction receipt when paying via EFTPOS - what a smart machine!

So, if you see this message, move the customer over to another machine, and/or quickly change the receipt roll, and you are good to go.

Cheers,
Nicole