An invoice is a formal request for payment after goods or services are delivered. Once the furniture was delivered, the store issued an invoice.
Pro Tip 2/3
Detailed Breakdown
An invoice usually itemizes charges so the recipient sees what they're paying for. The event planner's invoice listed costs for catering, decorations, and music separately.
Pro Tip 3/3
Professional Context
Invoices are most commonly used in business and professional settings, not personal ones. Her freelance contract stated that she would provide an invoice for her writing services.