Uber has started rolling out its "rider mask verification" across Canada to help implement its "No Mask, No Ride" policy it implemented back in May. If a driver reports that a rider isn't wearing a mask, the rider will be required to take a selfie with their mask or face cover before they can take their next Uber trip. Uber has said it removed access of over 1,250 riders in Canada and the US for failing to abide by the policy.
For their part, Uber drivers and delivery people are also required to verify that they're wearing a mask before they start to drive passengers or deliver food. They need to take a selfie that shows their mouth and nose are covered.
Source: Uber