Someone I know (it really isn't me) has just incorrectly received £6k into her a/c in two transactions. Forgetting the morality, what's the legal position? I always thought you could be made to pay it back but this suggests otherwise:

http://www.dailymail.co.uk/news/article-1212951/Warning-internet-money-transfer-loophole-cost-customers-thousands.html

(I didn't find that Daily Mail link either)