REPORT: Greece's economy will be locked down with capital controls if it can't find a deal by the weekend
That would mean a severe lockdown on flows of cash similar to the ones brought in for Cyprus in 2013- Strict limits on the amount that could be withdrawn from banks, taken abroad physically or passed between international accounts.
The move would slam the brakes on outflows of money streaming out of Greek banks, but would also make it more difficult for the country to recover economically and remain a functioning member of the eurozone.
Capital controls are easy to bring in, and hard to get out of.
Other European countries can't make that move on their own - there's no institutional procedure for the rest of Europe locking down an individual member state. Greece would have to pass its own law agreeing to the move.
The controls would reportedly be brought in if there's no progress by the time of Thursday's Eurogroup meeting of finance ministers. Greece's last €7.2 billion ($8.07 billion, £5.19 billion) bailout tranche is still in limbo, with the country and its creditors unable to reach an agreement on what reforms it should undertake to access the money. Athens needs that cash to make payments to the International Monetary Fund (IMF) on June 30, and the European Central Bank (ECB) on June 20.
Even before the Eurogroup meeting, Greece will have a crucial decision made for it - the ECB will decide tomorrow whether to raise the ceiling for the country's emergency liquidity assistance (ELA), the banking system's last lifeline. With money flooding out of Greek banks, the government will almost certainly want the ceiling raised.
Here's how bank deposits look:
Credit Suisse
Bloomberg's Lorcan Roche Kelly flagged up this message from the ECB to Cyprus in 2013, the point at which it refused to keep raising the ELA ceiling, saying that more funding "could only be considered if an EU/IMF programme is in place that would ensure the solvency of the concerned banks."
A similar message to Athens could force Greece's hand, and hurry either a deal or the implementation of capital controls.
But Greek finance minister Yanis Varoufakis reportedly told Germany's BILD tabloid that Athens has nothing to present at the Eurogroup on Thursday, when Europe's finance ministers gather again.
A statement from Prime Minister Alexis Tsipras accusing the institutions lending to Greece of pillaging the country with austerity measures was released on Monday, making it clear that Greek negotiators have moved as far towards a deal as they intend to.
Unless some urgent crisis drives the two sides back to the table, a deal this week looks very unlikely now.