I was at El Corte Inglés in Goya today and an older guy infront of me has bought 2 big hams and 2 boxes of wines .. the bill was €380 .. He gave over 2 credit cards and asked for half the bill to be charged to each card . The cashier had to say that a single bill cannot be payed by 2 cards . The guy was going crazy , arguing like mad , and eventually they cancelled the bill and re-scanned the hams seperately to the wines . So 2 bills . It took a lifetime !
I never spend that sort of money and always pay in cash but just in case you're in that supermarket and spending a lot of money with credit cards then you should be aware !