Amazon and coffee retailer Starbucks are being sued in U.S. federal district court for misusing customers’ biometric identifiers. Biometric authentication as a method of payment at Amazon’s Go stores was introduced in New York City in 2019. One scanners have since been added to other stores owned by Amazon. It is also alleged that Amazon uses a person’s size and shape to identify them in the stores. Each plaintiff alleges that Amazon is violating a 2021 city law by scanning palms without first posting required notices. That year, Starbucks went into business with Amazon in the first of multiple Starbucks-Go stores. Plaintiff court documents charge that Starbucks “sells, trades and shares customers’ biometric identifier information with Amazon in exchange for various things of value, and otherwise profits” from the deal. Specifically, the defendants are charged with “collecting, retaining, storing, converting, using, sharing and profiting” from hand geometries in violati