# Audit log

Every change, approval, and export in a GoBD-aligned trail.

Every meaningful change to an invoice is recorded in **Activity**: who changed what, when exports ran, when workflow steps completed, and when fields were edited. Use it for AP handoffs, controller review, and troubleshooting.

**Who this is for:** AP leads, auditors, and support staff who need a clear history of edits, exports, and workflow actions on a single invoice.

## 1. Open the Activity panel

1. Open an invoice in **Payables**, **Expenses**, or **Receivables**.
2. Select the **Activity** tab (or side panel, depending on layout).
3. Entries appear **newest first**.

System events (extraction finished, export started) and user events (field edit, approval) share the same timeline.

Filter the timeline with chips: **All**, **User**, **Edits**, **Workflow**, or **Exports**. Collapse ingest and match noise under **Cortena Agent Processing** (expand when you need the detail).

To download a branded PDF of the **current filter**, use **Audit package PDF** on the same tab. See [Download an invoice Activity report (PDF)](https://help.cortena.ai/guides/invoices/activity-audit-package).

## 2. What gets logged

| Event type | Examples |
| --- | --- |
| **Processing** | Imported, reprocessed, page-range reprocess |
| **Field edits** | Creditor, dates, payment terms, cost centres |
| **Line items** | Account, VAT code, amounts, new lines |
| **Workflow** | Step completed, reverted, approval granted |
| **Export** | Sent to DATEV, Twinfield, Exact, Agicap |
| **Status** | Payment status, display status changes |

Each entry shows **timestamp**, **actor** (user name or "System"), and a short **description**.

## 3. Field-level change detail

When someone edits booking or header fields, the log can show **before → after** values, for example creditor number or payment terms days.

Expand an entry to read individual field changes without comparing PDF versions.

## 4. Practical uses

- **Handoff** · see what a colleague already fixed before you pick up Needs review
- **Export disputes** · confirm exact export time and target system
- **Reprocess** · verify which page range or full reprocess ran
- **Compliance** · demonstrate four-eyes approval in the activity stream (GoBD-aligned trail)

Activity is **read-only**. You cannot delete or edit log entries.

To search activity across invoices, purchase orders, suppliers, and sub-entities, see [Workspace Activity](https://help.cortena.ai/guides/invoices/workspace-activity).

## Quick reference

| Task | Where |
| --- | --- |
| View history | Invoice detail → **Activity** |
| Filter | **All** / **User** / **Edits** / **Workflow** / **Exports** |
| Agent group | Expand **Cortena Agent Processing** |
| Download PDF | **Audit package PDF** → [Activity report](https://help.cortena.ai/guides/invoices/activity-audit-package) |
| Field changes | Expand user edit entries |
| Export proof | Look for "Sent to …" system entries |
| Reprocess trail | "Reprocessed using pages …" narrative |
| Related | [Editing invoices](https://help.cortena.ai/guides/invoices/editing-invoices) |