Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
all notices given by you or required from you under these terms of service or the supercell privacy policy shall be in writing and addressed to : supercell oy . 

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