Automation library · Money admin

Collect overdue payments with Slack

Started by another system calling it, and works across Gmail and Slack. 19 steps, 3 branches, 1 loop or waits: a working afternoon to understand properly.

Medium

19 stepsMedium: a working afternoon
3Branches: places the flow splits
1Loop or waits
2Services it connects to

The flow

Starts it 3Logic 9Service 7

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

  1. 1Daily Check 9 AMSchedule triggerStarts it
  2. 2Manual TriggerWebhookStarts it
  3. 3Error TriggerError triggerStarts it
  4. 4Get Overdue InvoicesHttp RequestService
  5. 5Format ErrorCodeLogic
  6. 6Has Invoices?IfLogic
  7. 7Slack Error AlertSlackService
  8. 8Process EachSplit In BatchesLogic
  9. 9Check Reminded TodayCodeLogic
  10. 10Build SummaryCodeLogic
  11. 11Not Reminded?IfLogic
  12. 12Post Daily SummarySlackService
  13. 13Calculate UrgencyCodeLogic
  14. 14Prepare EmailCodeLogic
  15. 15Route by UrgencySwitchLogic
  16. 16Slack Critical AlertSlackService
  17. 17Send ReminderGmailService
  18. 18Update Reminder CountHttp RequestService
  19. 19Log AttemptHttp RequestService

How it's built

Starts on
Another system calling it
Steps
19, with 3 branches, 1 loop or waits
Size
Medium: a working afternoon
Connects to
Gmail, Slack
Model
None. This is plumbing, not judgement

Questions

What does it need to run?

An n8n account, plus your own Gmail and Slack accounts. 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?

No. Every step is fixed logic or a call to a service, so it does the same thing every time.

How long does it take to set up?

Plan an afternoon. 19 steps is enough that you should read each one before running it.

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 19 steps before you point it at anything that matters.