Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
once bought , the giftor will receive an order confirmation and receipt . 

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