Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
for any transactions in nintendo shopping services you will receive an electronic receipt confirming the transaction . 

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