Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
( i ) our obligation to provide the products only comes into being when we take receipt of your order , and we confirm your purchase to you by email . 

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