Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
( g ) you agree to promptly notify headspace of any changes to the payment method you provided while any subscriptions remain outstanding . 

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