I really don't know. Even as a seeing person you need to have your wits about you, and I think most people sort notes by value in their wallet. Most other countries have notes whose size and color differs by value, so it's much harder to make mistakes.

In the US, IIRC they have a trusted person sort the bills by denomination for them -- like a friend or a bank teller -- and then they fold them into different orientations so they know what they've handed to a checkout clerk. No way for them to prevent being shortchanged, unfortunately.