The capital doctrine, also known as 'capital maintenance doctrine', is a safety measure for creditors to ensure that a company's capital remains intact. This doctrine originated in England in the 'Flitcroft Case' and has been developed further in Australia through the Corporations Act 2001. The doctrine aims to protect the interests of creditors by preventing companies from repaying their shares or diverting capital for personal gain. In Australia, the approach is more liberal, making directors personally liable for any changes to a company's capital, while in the UK, the focus is on protecting creditor interests.