Send payment reminder to member

Trigger: A billing system flags a member's premium payment as upcoming, past due, or entering a grace period.

1. Query billing system for overdue or upcoming premium payments
2. Verify member contact information and communication preferences
3. Generate payment reminder with balance, due date, and payment methods
4. Transmit reminder via mail, email, SMS, or automated call
5. Record the communication event in the member management system

Outcome: The member receives a timely notification detailing the outstanding balance, payment instructions, and potential consequences of non-payment.