Then is should be declared in advance on the menu.

Adding an undeclared "service charge" to the bill only when it is presented to you is what we are talking about here. It is an increasingly common underhand tactic in and around London and an charge which one should ALWAYS ask to be removed ("that wasn't on the menu mate").

Simply ask for it to be removed.

Then, if you wish, tip the staff whatever amount you prefer. (Though at this point, any restaurant that tries sneakily adding an additional charge to my bill probably isn't getting anything).

It's pretty common where I live in Asia, and they almost always write it on their menu, too. I don't really see it as shenanigans as long as it's communicated in advance. We don't have a tipping culture, though.

I doubt whoever thinks installing this US software on UK/Irish POS terminals has done their homework. Its simply one way to piss off the customers and embarrass the staff.

Dismiss button? From what I've seen, it's a "Custom" button, where you then have to explicitly type in 0.

The only way its going to stop is if there are consequences for asking too much.

You them everywhere. Most insane are the bars where you have to walk up from your seating to the bar to order, the bartender plops the drinks on the bar and immediately moves on to another customer, and the terminal still displays default tip amounts and you have to do custom → €0. What the hell am I tipping you for?

At this point I'm waiting for supermarket self-checkout to add a default tip amount.

It's configurable on any terminal that supports it — obviously the terminal is designed so it can be used in a restaurant, or for paying in a shop, or paying a fee to the government. (To give an example of where even Americans don't tip.)

There's a bunch of them, but the tip offers are usually on the newer touchscreen (probably android based) ones.

The old ones (never seen the tip option on those... for now): https://www.simple-shop.si/en/pos-terminal-tcpip-en and eg https://www.unicreditbank.si/si/podjetja/upravljanje-z-denar...

The new ones: https://www.sumup.com/sl-si/karticni-citalec-terminal/ and https://besteron.com/si/pos-terminali/ (both support tips) + many other in similar designs (full front touchscreen)

I don't think square supports slovenia for now, but POS vedors add the tip option, and our restaurant owners enable it, because it doesn't cost them anything, any many (especially foreign) guests "feel bad" for choosing the zero on the screen.

It still should be on the sticker price if the rules were consistent.

This is obviously regional too; here in finland all stores that sell "drinks" have a machine for accepting returns.

It doesn't matter what kind of bottle it is, or which company made it, all returns are accepted at every point.

Children, unemployed, and elderly people are often seen hunting for stray cans/bottles, by bins, in parks, and similar places, to return them for the cash.