Which feature helps in reminding customers of their unpaid invoices?

The feature that effectively reminds customers of their unpaid invoices is Customer Statements. Customer statements provide a comprehensive overview of a customer's account, including outstanding invoices, payments received, and any credits or adjustments that may have been applied. By generating and sending customer statements, businesses can keep their clients informed about their current balance and any overdue amounts, prompting them to take action on their unpaid invoices. This proactive communication can enhance cash flow and improve the likelihood of timely payments.

Other options serve different purposes. Locking all transactions helps maintain data integrity but does not directly address unpaid invoices. Accounts Payable (AP) Aging Reports focus on what the company owes to vendors rather than what customers owe. Payment terms define the conditions under which a payment is expected but do not actively remind customers of outstanding invoices. Therefore, Customer Statements is the most effective choice for reminding customers about their unpaid bills.