A customer loading shopping into the back of a car in the parking lot of a Walmart store
A customer in the parking lot of a Walmart store
  • Walmart has spent months testing and rolling out a facial recognition tool to verify its Spark drivers.
  • But some say the feature didn't recognize them, leading Walmart to deactivate their accounts.
  • Some Spark drivers appear to be using accounts under other peoples' names, Business Insider previously reported.

Last Thursday, Walmart's Spark app prompted Chastity Lopez to take a picture of her face to verify that she was the one using her account.