“Rendering my cash invalid with no recourse” might be on the extreme end of this, if the places that its checked are ATM and banks - so long as it’s still exchangeable for goods/services (e.g. not being checked by stores)

I’ll keep an eye out for kore info though.

But yes, with serials are tracked when taken from/put in ATM/bank, it is not anonymous. Potentially breaking larger bills at common places (stores/gas stations) could mitigate this, but theres still information about where you’ve been inherent in that.

You happen to have a source for this? I can’t seem to find much.

Will stores be checking the serial of every bill they take? That doesn’t seem scalable. I’d expect they would just be not recirculated the next time it’s brought to a bank. Or if it has to be in stores, by checking the series, not serial.