In France, making _ and proving _ a payment now as easy as a tweet

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Did someone spot you some money for lunch two weeks ago? In France, Twitter users can now publicly repay debts, donate to charity or chip in for a gift with a new payment service backed by the country's second-largest banking service.

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Group BPCE, which includes Banque Populaire and Caisses d'Epargne, announced the service — called S-money — on Tuesday.

Users tweet a payment request to S-money, which then requires an authentication code before sending the amount — and a tweet to the destination confirming payment for all the world to see.

Armand Dos Santos, chief technical officer for S-money said: "We think that this is quite interesting for the Twitter user to be able to communicate the financial transactions that he has made."

The service only works between French users.