Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
if you are not the bill payer , we will assume that you have received permission from the bill payer . 

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