# Upload Documents
Attach PDFs, scans, photos, and supporting documents to a hosted intake session
Source: https://www.klarefi.com/docs/guides/upload-documents

## Overview

In Hosted Intake, applicants upload documents inside the Klarefi session. Those
documents stay attached to the case, so the resulting facts, gaps, and evidence
all point back to the same intake record.

## Hosted Intake Uploads

Create the hosted intake session, redirect the applicant to `signed_url`, and
let Klarefi ask for the documents required by the workflow. The applicant does
not need a separate upload portal.

## Document Metadata

Use stable identifiers on the session when you already know them:

- `external_case_id`
- `external_applicant_id`
- `external_customer_id`
- `trace_id`

These identifiers let your system reconcile webhook events, case reads, and the
final case package back to your own records.

## Review Behavior

Uploaded documents are read against the workflow's required facts. Klarefi can
continue the intake when evidence is present, ask a follow-up question when
something is missing, or route the case to review when the document is ambiguous
or unreadable.

## Related Guides

- [Hosted intake](/docs/guides/hosted-intake)
- [Create an intake session](/docs/guides/create-intake-session)
- [Webhook setup](/docs/guides/webhooks)
- [Evidence reference](/docs/reference/evidence)