Tough economic times and growing poverty in much of Europe are reviving a humble tradition that began some one-hundred years ago in the Italian city of Naples. It’s called caffè sospeso — “suspended coffee”: A customer pays in advance for a person who cannot afford a cup of coffee.

The Neapolitan writer Luciano de Crescenzo used the tradition as the title of one of his books, : Saggezza quotidiana in piccoli sorsi (“Suspended coffee: Daily wisdom in small sips”).

“It was a beautiful custom,” he recalls. “When a person who had a break of good luck entered a cafe and ordered a cup of coffee, he didn’t pay just for one, but for two cups, allowing someone less fortunate who entered later to have a cup of coffee for free.”

The barista would keep a log, and when someone popped his head in the doorway of the cafe and asked, “Is there anything suspended?” the barista would nod and serve him a cup of coffee … for free.

It’s an elegant way to show generosity: an act of charity in which donors and recipients never meet each other, the donor doesn’t show off and the recipient doesn’t have to show gratitude.

The writer says the tradition is part of the city’s philosophy of life. “In other words, it was a cup of coffee,” de Crescenzo says, “offered to the rest of humankind.” It was a time, he adds, when there were more customers who were poor than those who were well-off.

It’s fitting that the tradition started in Naples, a city that prides itself on having the best coffee in Italy. And in a country where the first coffeehouse in Europe opened in 1683 (in Venice), that is no small claim.

Before the production of modern commercial espresso machines, Italians made coffee at home on the stovetop.

Naples and coffee are inseparable, but the caffè sospeso tradition waned as Italy entered the boom years of postwar reconstruction and La Dolce Vita. For decades, the custom has also been confined mainly to the Christmas season.

Now, it’s made a comeback. Two years ago, with the eurozone crisis already raging, unemployment rising and small businesses closing on a daily basis, more and more Italians could no longer afford the national beverage — an espresso or a cappuccino.

Then someone remembered the old Neapolitan custom. So several non-governmental organisations got together and with the support of Naples Mayor Luigi de Magistris, Dec.10 was formally declared “Suspended Coffee Day.”

The practice is now spreading to other crisis-ravaged parts of Europe.

In Bulgaria, the European Union’s poorest country, where several desperate people have set themselves on fire in recent months, more than 150 cafes have joined an initiative modelled on the Neapolitan “suspended coffee” tradition.

In crisis-wracked Spain, a young man from Barcelona, Gonzalo Sapina, in a few short weeks started a network called Cafes Pendientes (“pending coffees”) and promoted the initiative among numerous coffee shops.

In France, several cafes now carry the logo “cafe en attente” (“waiting coffee”).

Other countries that have joined the “suspended coffee” initiative include Ireland, Hungary, Australia and Canada.

The prepaid cup of coffee has become a symbol of grass-roots social solidarity at a time of mounting poverty in what, until recently, were affluent Western societies.