6 links have been added on this idea.
  1. While a good idea, facial recognition can also create a host of legal issues, like this school’s improper use of the technology for its cafeteria.
    https://www.bbc.com/news/articles/ckrgek8mxl4o

  2. Vietnam also uses facial recognition payment systems to increase security for high-value digital transactions.

  3. In the near future, facial recognition payment systems might completely replace credit cards and cash.