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