Moscow uses facial recognition for payments on the metro
Ostensibly they are using it to give passengers the option to pay that way. Their face is tied to their credit card in this optional system, and they can pay for their trips that way.
15k people volunteered to test the system before it was made public this week.
To do facepay, you have to stop in front of the camera for a second before entering the train gates.
Moscow has over 200k facial recognition cameras.They were used earlier this year in the arrests of demonstrators at opposition protests.