Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
please note that receiving the order acknowledgement does not mean that your order has been accepted . 

```
. OPTIONS: ['Contract by using' 'Choice of law' 'Unilateral termination'
 'Content removal' 'Arbitration' 'Limitation of liability'
 'Unilateral change' 'None' 'Jurisdiction'].