Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
a person who purchases the gift is referred to in these terms as the `` giftor '' . 

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