Square has just launched a new service called Square Cash, which allows quick money transfers between any two parties using through an email. Contrary to what you might be expecting, you don’t need to sign up or get all of your friends onto Square Cash to share funds. Instead, you just need to link a debit card to your account.
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Once you’ve done that, sending an email to any contact with a dollar amount in the subject line and adding firstname.lastname@example.org in the CC field will allow the recipient to collect the money with one or two business days. Once you’ve linked a debit card to your account, money can also be deposited to that card whenever your friends transfer money to you. The payments are processed for free through Square.
You can get started with Square Cash through the iPhone app, which is available for free on the App Store.