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29 September 2015 Last updated at 18:35 BST
Janice McAleese, who headed the Northern Ireland Events Company (NIEC), fabricated documents to cover-up losses of £1.5m.
BBC News NI's business correspondent, Julian O'Neill, reports.
The Northern Ireland Audit Office has said the conduct of the former chief executive of a Stormont-funded company is the worst it has seen from a senior public official.