This article provides a historical overview of the factors leading up to debt crises and the default mechanisms used by governments to solve them, ranging from repudiation and restructuring to inflation tax and financial repression. The paper also analyses the Spanish governments’ graduation to responsible public debt management under democracy and the last debt crisis starting in 2010. After analysing the evolution of the outstanding public debt, budget deficits, the Spanish economy's ability to borrow, the central government's debt affordability and the profile of public debt, the article concludes that the Spanish case confirms the main hypotheses of concerning international debt crises: short-term borrowing enhanced the risk of a debt crisis; insolvency problems arose when governments were unwilling or unable to repay debt; debt crises took place after large capital inflows; most outright defaults ended up being partial defaults; public debt level became unsustainable when it rose above 60-90 per cent of GDP; default trough inflation became commonplace when fiat money displaced coinage; financial repression was used as a subtle type of debt restructuring; and defaults endangered the creditworthiness of the Spanish Finance Ministry and forced disciplined fiscal policies.