square, google, gmail, email, paymentsLess than a week after Google launched a service that allows private individuals to transfer money by email, Square has launched a similar product in a private beta.

If a user cc’s Square in an email promising money and puts an amount in the subject line, the payment processing company will transfer the funds into the recipients debit card account.

To use the service, called Cash, both parties must have their accounts linked to a Square account.

A payment, which cost $0.50 to send and nothing to receive, can be canceled up until the moment that the recipient picks it up.