She was concerned about being asked about such matters for legal reasons and on grounds including her personal security, she said.
Ms Quinn said some €340,000 was paid into her Ocean Bank account in Moscow in summer 2011, and there was about €12,500 left in that account last August.
She was paid the €340,000 under contracts of employment with Russian companies while she remained in Ireland apart from one visit to Moscow to open the Ocean Bank account, she also said.
She had signed the contract without understanding it because it was in Russian and had no documents indicating what work she was expected to do, she agreed.
She had some receipts related to a small amount of the money but did not ask for receipts for the rest, she said. She was not in the habit of keeping receipts for day-to-day living expenses such as groceries and petrol, but some of the money would be spent on other matters. When asked was that evidence "entirely implausible", she said that was her evidence.
Ms Quinn is being cross-examined by Shane Murphy, for Irish Bank Resolution Corporation, with a view to establishing if she has fully disclosed information concerning her assets and accounts and any involvement with companies in her family's international property group.