Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
( a ) an electronic or physical signature of the person authorized to act on behalf of the owner of the copyright or other intellectual property interest ; 

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