Have to know if this seems right?

I get all the caution with what seems to be happening in the world. I'm not against caution. I'm not out to want to hurt good people. But is this really right?

A lot of places I do business with are now refusing to take cash. You have to pay with a card only. I didn't think that was possible. Would not this require some sort of government mandate?

Our paper literally states "This note is legal tender for all debts, public and private"

If someone wanted to float a government conspiracy. I could draw all kinds of inference on this one.