European leaders have told Greece that it must do more to prove it is pushing through the reforms its creditors have demanded before it can receive a €2bn (£1.4bn) aid payment.
The debt-stricken country has been at odds with its lenders over the protection it can offer families at risk of being made homeless because of mortgage defaults.
Greece clinched an €86bn bailout in the summer, in return for promising measures to reduce its deficit such as higher VAT rates and pension cuts. Its lenders have also demanded new laws to help banks repossess homes from people who cannot meet their loan repayments.
The new sticking point turned the buildup to a key Brussels meeting of eurozone finance ministers on Monday night into a series of tit-for-tat briefings reminiscent of the height of the bailout crisis earlier this year.