In what cases can a business refuse to take cash?
You have to take legal tender to settle a debt. If your business model doesn't involve the customer incurring a debt that is then settled, you don't have to take cash. For example, in a restaurant where you pay after eating, you can insist on paying cash, because you're settling a debt. But in McDonald's they can refuse your cash at the counter, because you've not received your food yet and so no debt has been incurred.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
In what cases can a business refuse to take cash?

### Response:
You have to take legal tender to settle a debt. If your business model doesn't involve the customer incurring a debt that is then settled, you don't have to take cash. For example, in a restaurant where you pay after eating, you can insist on paying cash, because you're settling a debt. But in McDonald's they can refuse your cash at the counter, because you've not received your food yet and so no debt has been incurred.