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