Square launched a free service Tuesday that lets anyone send money via email to anyone else.
The service, known as Square Cash, was previously available only in an invite-only beta. For now, at least, it is only available in the United States.
Square Cash doesn't require either person in a transaction to have a Square account, and there are no fees, said product manager Brian Grassadonia. In order to send money, all that's required is for the sender to address an e-mail to the recipient, with a CC: to firstname.lastname@example.org, and the amount in the e-mail's subject line. The body of the email can contain any information the sender wants.