Cardtronics, the largest ATM operator in the world, announced that Amazon customers can load cash onto their Amazon cash balances at up to 400 of its ATM sites in the U.S. by using a mobile number. They can add $5 to $500 to their balances by verifying the mobile number linked to their Amazon accounts and deposit the cash electronically by entering their mobile numbers at one of 400 Allpoint+ ATMs. 

An Amazon gift card is digitally added to the customer's Amazon balance and can be used for purchase. No physical card is required to complete the transaction. 

"Cardtronics Allpoint+ with Amazon Cash is providing more access and more choice for millions of cash-centric customers by leveraging the power of our extensive network of convenient ATM locations," Brad Nolan, executive vice president, Allpoint Solutions at Cardtronics, said in a company release. "Freeing the ATM from the constraints of traditional credit cards allows us to offer secure and convenient services to a virtually unlimited variety of digital accounts, well outside traditional checking and savings programs."

The Allpoint+ network operates in major retail establishments in major U.S. markets, including New York, Chicago, Dallas, Houston and Miami. Additional ATM locations are planned for other cities.