Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
tripadvisor also reserves the right to take steps to verify your identity to process your reservation . 

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