i own and work in a convenience store.
we use a machine that prints out top ups for mobile phones.
one day a guy (foreigner) asks for a certain one for 10 euros i print it out give it to him and he was fidling behind the counter i thought he was getting money out or something, then he says one minute i call friend, he phones (or pretends) to phone a friend and then says no i dont want this one i want the other kind, so i take it back,he pays for the other and leaves.
when another customer asked for the same one i gave him the previous one i printed as i was already charged for it, and it wouldnt work! the other guy must have photographed or memorised the top up number.
i told my mil this as she works the shift after me and she said he also did it to her!
fair enough whats done is done but ahoy! He shows up again a while after this and i didnt even remember who he is but he looked suspicious, he asked for the same top up card, i print it out keep it firmly in my hand and say 10 euros, he says oh and i want red bull (cigs) i get them hold it in my hand with the card and tell him the price, he pats his pockets says ah i forgot my money i come back in 5 minutes, he left and returned the NEXT day asks me if i have something in a bigger size, i say no he says oh i wanted the bigger one and leaves (he obviously was expecting to find someone else here as its not me usually at that time and he found an excuse and left.
the top up card he wanted is now sitting here as no one ever buys this one.
but i have to pay for it

another guy from the same country as him came in and asked for the same top up and i said i dont have any..
so what do i do next time he comes in? ask him why he didnt come to get the phone car last time? tell him to not shop here again?
p.s im a coward ...
edit:
i just looked in the drawer and found 4 of these same top ups, next time he comes ill give him one of the ones he already stole! thats 40 euros he stole that i know of so far. the reason we didnt catch this before is because the guy who was working here isnt anymore and he didnt realise the guy was stealing