Designing an invoice approval workflow that auditors accept

Gate the release, not the drafting

Let anyone draft. Block the moment the document leaves the building: the client-facing PDF or Word copy, and any compliance export such as XML or JSON.

This keeps the sales side fast while making the outbound document a controlled event with a named owner.

What the log must contain

A defensible audit trail answers who, what, when and in what form — for every release, forever.

• Actor identity and role at the time of the action
• Invoice identifier and version
• Action: approved, rejected, released, re-released
• Export format and jurisdiction profile used
• Timestamp in UTC, written append-only

Separation of duties without bureaucracy

For most SMEs, requiring a different person to approve than to draft is enough. For regulated or government deployments, add role-based restrictions so that approval rights are a distinct permission rather than a property of seniority.