Mastercard and Green-based Diebold Nixdorf are working together to test card-free ATM transactions, and the two are demonstrating the technology this week at the Money20/20 Europe conference in Amsterdam.

Account holders will be able to connect with participating ATMs using a smartphone app to make secure transactions, the companies said in news releases Monday.

“As a technology company, we are always considering what the future can bring, and today we have a great opportunity with Diebold Nixdorf to define the next wave of digital products to the ATM channel,” said Daniel Goodman, senior vice president, ATM Product Management at Mastercard.