Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
before filing a claim against fitbit , you agree to try to resolve the dispute informally by contacting support@fitbit.com . 

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