> ## Documentation Index
> Fetch the complete documentation index at: https://help.elationhealth.com/llms.txt
> Use this file to discover all available pages before exploring further.

# The Letter Object

## Working with letters via the API

**Signing a letter through the API requires the practice to have API document signing enabled.** See [Errors](/articles/rest/overview/errors#api-document-signing) for the exact error and how to request it.

## Field notes

* `tags` is documented separately. See [The Document Tag Object](/articles/rest/patient-document-api/document-tags/the-document-tag-object).