Fiserv, a financial services technology provider, launched ZashPay last year to help its bank and credit union clients compete in the growing person-to-person payments market against the likes of PayPal. The payment service lets anyone with a U.S. bank account send or receive money without needing to know the other person's bank account information. The big upside for customers is that they don't need to create a holding account, since the money can come right out of their existing bank accounts. ZashPay is accessible through participating online banking sites and at ZashPay's site. To send money, users need only know the recipient's name and email address or mobile phone number. Payments can be delivered in as little as one business day. Fiserv's financial institution clients have the option of charging a fee, creating additional revenue for them. More than 500 financial institutions have implemented ZashPay.