A German heating and plumbing company's self-hosted n8n workflow that reads open invoices from Lexware Office, pulls customer context from Hero Software, and has a Hermes agent draft each reminder. Switch between the state it was found in and the repaired state.
Figures describe 412 open invoices and a replay of 214 historical reminder letters. What stays deliberately manual: the decision to hand an invoice to a lawyer or collection agency. The workflow prepares the case in Jira and the watchdog makes sure it is never left waiting.