# Underutilization Insurance Sparx's underutilization insurance model ensures that any underutilized Reserved Instances purchased on your behalf by Sparx are automatically transferred and sold out of your account and the difference is refunded in the form of a credit on the following month’s bill. For example, Sparx recommends a t2.xlarge instance in `us-east-1` (N Virginia). After running for 300 hours, the instance becomes underutilized. When this happens, Sparx will automatically transfer the instance to another company in our customer pool or list it on the EC2 Reserved Instance marketplace so that it is sold to another company. Sparx is constantly scanning the marketplace for the most liquid instance types and will re-size and re-list your instance accordingly. The cost of the window from when the instance became underutilized would then be credited to you out of the next month's bill. {% hint style="info" %} Note: Any over-provisioning that occurs as a result of user action is not covered by this guarantee. {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.usesparx.com/sparx-documentation/product-overview/cloud/underutilization-insurance.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.