π§ What I built:
Automated invoice reminder system in n8n
that reads a Google Sheet, sends Gmail reminders
to unpaid clients, and updates the sheet automatically.
π The result:
3 unpaid invoices β reminders sent + sheet updated
in one workflow run. Zero manual work.
π§ Biggest lesson:
"Column to match on" must be a unique ID β
cost me an hour. Won't forget it.
π Tomorrow:
Escalating reminders β 4 email tones
based on how many days overdue.
Day 1 of building in public. π
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