> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://support.haddock.app/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Complete documents sent for validation or retrieval

Some documents open special completion flows instead of the standard document profile.

## Validation flow

When haddock needs you to confirm OCR totals or line items, open the document from **Needs review** and choose **Review**, or follow the link to `/documents/validation/:id`.

In validation you step through:

- Document header fields and VAT breakdown.
- Line details and linked products.

Save each step until the document moves to **Processed** or returns to **Needs review** if data is still missing.

## Retrieval flow

When a document must be recovered or completed after a failed or partial digitization, haddock can send you to `/documents/retrieve/:id` to finish the upload with the required fields.

## Related articles

- [A document has not been digitized](https://support.haddock.app/en/article/a-document-has-not-been-digitized-tqc9kk/)
- [Why a document has been sent for review](https://support.haddock.app/en/article/why-a-document-has-been-sent-for-review-k4b35b/)
- [Report an error in a document](https://support.haddock.app/en/article/report-an-error-in-a-document-1kqzd7u/)