What action should be taken to update unpaid invoices in QuickBooks Online?

Running the accounts receivable report to check for overdue invoices is a critical action that allows you to keep track of the status of unpaid invoices effectively. This report provides a comprehensive overview of outstanding invoices, empowering you to identify overdue accounts, follow up on payments, and manage your cash flow. By regularly reviewing this report, you can prioritize collections and ensure that no unpaid invoices are overlooked.

The other options do not provide effective solutions for managing unpaid invoices. Deleting old invoices and creating new ones disrupts your financial records and may lead to compliance issues, as it prevents accurate tracking of transactions. Contacting only customers who have not paid overlooks the importance of keeping an organized view of all unpaid invoices and may lead to missed opportunities for collecting payments from customers who may need reminders. Marking the invoices as paid without actually receiving payment compromises financial integrity and prevents correct reporting of Business Accounts Receivable, leading to inaccuracies in financial statements. Therefore, regularly running the accounts receivable report is the most efficient and professional method for managing unpaid invoices in QuickBooks Online.