[DanBC]

In England and Wales you haven't completed the offence until you walk out the store. (And even then you need to have dishonestly appropriated the item, not just forgotten it's in a pocket).

So you might have a guard following you around but they shouldn't be doing much more until you leave.

[LyndsySimon]

As far as I know, that’s the case in the US as well.

[Markoff]

i would think this it's same in any country with laws, except it's walking past cashiers