diff --git a/docs/ConfigurationGuide.md b/docs/ConfigurationGuide.md
index 3498621c..b16a2636 100644
--- a/docs/ConfigurationGuide.md
+++ b/docs/ConfigurationGuide.md
@@ -212,10 +212,11 @@ SECURITY_HEADER_CSP_VALUE="default-src 'self'; script-src 'self' https://trusted
 
 ### Paperless NGX
 
-| **Variable**                  | **Description**                                     |
-|-------------------------------|-----------------------------------------------------|
-| `PAPERLESS_NGX_API_TOKEN`     | API token for Paperless NGX.                       |
-| `PAPERLESS_HOST`              | Root URL for Paperless NGX (e.g. `https://paperless.example.com`). |
+| **Variable**                      | **Description**                                                                                     |
+|-----------------------------------|-----------------------------------------------------------------------------------------------------|
+| `PAPERLESS_NGX_API_TOKEN`         | API token for Paperless NGX.                                                                        |
+| `PAPERLESS_HOST`                  | Root URL for Paperless NGX (e.g. `https://paperless.example.com`).                                 |
+| `PAPERLESS_CUSTOM_FIELD_ABSENDER` | (Optional) Name of the custom field in Paperless-ngx to store the sender ("absender") information. If set, the extracted sender will be automatically set as a custom field after document upload. Example: `Absender` or `Sender` |
 
 ### Dropbox
 
diff --git a/docs/UserGuide.md b/docs/UserGuide.md
index d464d182..6ab73be2 100644
--- a/docs/UserGuide.md
+++ b/docs/UserGuide.md
@@ -145,6 +145,19 @@ Depending on the system configuration, DocuElevate can perform:
 - **PDF Conversion** - Convert various file formats to PDF
 - **Document Distribution** - Store documents in Dropbox, Nextcloud, or Paperless NGX
 
+### Paperless-ngx Integration
+
+If Paperless-ngx is configured, DocuElevate can automatically upload processed documents and set custom fields with extracted metadata:
+
+1. **Automatic Upload**: After processing, documents are automatically uploaded to Paperless-ngx
+2. **Custom Fields**: If configured via `PAPERLESS_CUSTOM_FIELD_ABSENDER`, the sender ("absender") information extracted by AI will be automatically set as a custom field in Paperless
+3. **Setup Requirements**:
+   - Create a custom field in Paperless-ngx (e.g., named "Absender" or "Sender")
+   - Set the `PAPERLESS_CUSTOM_FIELD_ABSENDER` environment variable to match your custom field name
+   - Ensure the custom field exists in Paperless before processing documents
+
+**Note**: The custom field feature requires that the field is already created in your Paperless-ngx instance. DocuElevate will look up the field by name and set its value automatically.
+
 ## API Access
 
 For programmatic access, DocuElevate provides a comprehensive REST API: