Comment by davelondon

I was in India earlier this year, and found there was no way (and I spent hours trying) for a foreigner to get access to the UPI system. This meant:

1) There were some cashless fast food outlets that I couldn't eat at

2) There was no way for me to book an intercity bus ticket

I eventually managed to get a bus ticket by sweet-talking someone in a shop to use their personal UPI account in exchange for cash.

I fear there's going to be more problems like this for travellers as communities go cashless around the world.