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