Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
all notices given by you or required under this agreement shall be faxed to linden lab legal department at : (415) 243-9045 ; or mailed to us at : linden lab legal department , 945 battery street , san francisco , ca 94111 . 

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