Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
2.4 user verification on the internet is difficult and we do not assume any responsibility for the confirmation of any member 's identity . 

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