Contactless payment allows customers to authorize payments by tapping payment tokens like contactless cards or mobile wallets near a merchant's POS system. It provides a fast, convenient checkout experience known as frictionless payment. The Covid-19 pandemic increased demand for contactless payments by encouraging tap-and-go transactions over handling cash or cards. Contactless uses near field communication technology where payment devices and POS terminals exchange encrypted data within 10cm to complete secure transactions quickly. Besides speed, contactless payments can also reduce lines and improve throughput for venues like transit systems.