# Type Alias: LicenseErrorReason

[Mobile Document Scanner API Reference](../index.md) / LicenseErrorReason

# Type Alias: LicenseErrorReason

> **LicenseErrorReason** = `"expired"` \| `"rejected"` \| `"unreachable"`

Defined in: [src/faults.ts:29](https://github.com/Dynamsoft/document-scanner-javascript/blob/main/src/faults.ts#L29)

The reason that a license check failed: the key `expired`, the engines
`rejected` the key, or the document scanner reached no license server
(`unreachable`).