 In September, internal documents from Kaupthing Bank were leaked, from shortly before the collapse of Iceland's banking sector, which caused the 2008–2012 Icelandic financial crisis.The document shows that suspiciously large sums of money were loaned to various owners of the bank, and large debts written off.In October, Joint Services Protocol 440, a British document advising the security services on how to avoid documents being leaked, was published by WikiLeaks.