Made me laugh... as well as feel bad of course... but mainly laugh...
Somerfield's are a supermarket, yes? They do Saver cards, yes? When you apply for a saver card you get three copies of it... you know, like, for a whole family to use. So cuz my lovely Ann-Lou!se had three and needed only two, she offered me the third one so I could get saver card offers.
I'd been using this for months when she asked me today "did you ever get vouchers for free stuff?" (like "spend £20, get £3 off) and I went "yeah I did. Not in a while but at the beginning I got quite a few, and really good ones too (like the one just mentioned), did you not?" She said "no, we never did and we spent loads of money there."
Turns out (obviously) they did a massive shop a few times, and I happened to be the next one to use the card, so I got the offers that went with it. 
(and some of them I didn't even use!)
I offered to give her the money back of course, and she refused of course, but I'll buy her a little something as compensation I guess. Just for the laugh I had when we found out. 
She's so cute btw. 
(and mine but she doesn't know that. 
)
ooh... what a shame!