Automation library · Money admin

Enterprise expense & invoice fraud detection with OpenAI

Started by another system calling it, and works across Email, Google Sheets and Slack. It hands the judgement calls to OpenAI. 7 steps: small enough to read in one sitting and change without fear.

SmallCalls a model: OpenAI

7 stepsSmall: readable in one sitting
0Branches: places the flow splits
0Loops or waits
3Services it connects to

The flow

Starts it 1Model 1Logic 1Service 4

The steps in the order they run, from what starts it.

  1. 1Expense/Invoice TriggerWebhookStarts it
  2. 2Fetch ERP DataHttp RequestService
  3. 3AI Fraud AnalysisOpen AiModel
  4. 4Flag Suspicious ClaimsFunctionLogic
  5. 5Route to Audit TeamEmail SendService
  6. 6Log to DashboardGoogle SheetsService
  7. 7Notify FinanceSlackService

How it's built

Starts on
Another system calling it
Steps
7
Size
Small: readable in one sitting
Connects to
Email, Google Sheets, Slack
Model
OpenAI

Questions

What does it need to run?

An n8n account, plus your own Email, Google Sheets and Slack accounts, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on another system calling it.

Does it use AI?

Yes. It calls OpenAI. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Not long. At 7 steps it can be read in one sitting and changed without fear.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

Before you run it

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 7 steps before you point it at anything that matters.