# Page Not Found

The URL `reference/invoices/invoice-statuses/underpaid` does not exist.

You might be looking for one of these pages:
- [Underpaid](https://developers.cryptopay.me/guides/invoices/how-to-handle-unresolved-invoices/underpaid.md)
- [Invoice statuses](https://developers.cryptopay.me/guides/invoices/invoice-statuses.md)
- [Overpaid](https://developers.cryptopay.me/guides/invoices/how-to-handle-unresolved-invoices/overpaid.md)
- [Invoice hosted page](https://developers.cryptopay.me/guides/invoices/invoice-hosted-page.md)
- [Invoice refunds sequence](https://developers.cryptopay.me/guides/invoices/how-to-handle-unresolved-invoices/invoice-refunds.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://developers.cryptopay.me/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://developers.cryptopay.me/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/guides/invoices/how-to-handle-unresolved-invoices/underpaid.md`)
- Use `Accept: text/markdown` header for content negotiation