Goal: Send one reminder 3 days before invoice due date Configuration: Reminder Schedule: 3 Daily Send Time: 09:00 (9 AM) Subject: "Your Invoice {invoice_number} is Due in {days_until_due} Days" Body: Include customer name, amount, due date, and payment link Goal: Multiple reminders to gradually build awareness and increase response Configuration: Reminder Schedule: 14, 7, 1 (three reminders) Daily Send Time: 08:00 (8 AM) Subject: "Payment Reminder: Invoice {invoice_number} due {due_date}" Body: Friendly first reminder, urgent second reminder, final urgent third reminder Goal: Start reminding early to reduce payment delays Configuration: Reminder Schedule: 30, 21, 14, 7, 3, 1 (six reminders) Daily Send Time: 06:00 (6 AM, before business hours) Subject: "Invoice {invoice_number}