Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
to receive a paper copy , please request it by emailing us at help@headspace.com 

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