Four requests to transfer a total of about $81 million to the Philippines went through, but a fifth, for $20 million, to a Sri Lankan non-profit organisation was held up because the hackers misspelled the name of the NGO [nongovernmental organization] Shalika Foundation.

Hackers misspelled "foundation" in the NGO's name as "fandation", prompting a routing bank, Deutsche Bank, to seek clarification from the Bangladesh central bank, which stopped the transaction, one of the officials said.

http://finance.yahoo.com/news/hackers-typo-helped-stop-billion-081440197.html