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