Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
guests and hosts agree that we may seek additional amounts from you in the event that the taxes collected and/or remitted are insufficient to fully discharge your obligations to the tax authority , and agree that your sole remedy for occupancy taxes collected is a refund of occupancy taxes collected by airbnb from the applicable tax authority in accordance with applicable procedures set by that tax authority . 

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