Documenting how we automate Zoho Books invoice follow-ups end-to-end - API + AI agent included

Built this guide after seeing the same AR problem repeatedly, teams manually chasing invoices while Zoho's automation layer sits mostly unused.

Covers three tiers: native reminders, workflow rules with conditional logic, and Zoho Books API integration for AI-generated follow-ups with human-in-the-loop approval on high-value invoices. Practical setup, not theory.

Worth a read if you're on Zoho One and still doing any of this manually.