Why don't some places require a credit card receipt signature, and some do?
Merchants apply in advance for the program, and the amount is limited to less than $25.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Why don't some places require a credit card receipt signature, and some do?

### Response:
Merchants apply in advance for the program, and the amount is limited to less than $25.