Grocery giant Woolworths has scrambled to cancel over $1 million worth of shopping vouchers after a massive leak of customer data, in which it mistakenly emailed the redeemable codes of 8000 gift cards containing the customers' names and email addresses.

http://www.smh.com.au/digital-life/consumer-security/woolworths-leaks-1-million-of-gift-cards-in-massive-data-breach-debacle-20150530-ghd8wl.html