Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
the nintendo account is personal to you and you may not sell , trade , assign or otherwise transfer your nintendo account to any other person or entity . 

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