Want to know how to write an email with an invoice attached? Read on for our top tips, as well as a sample invoice email you can use for your customers.You'll learn essential tips to write the best invoice emails and provide 6 invoice business email templates and a template for you to use. Use this invoice email template to write and send invoices that are straightforward and easy to understand, making it easier for you to get paid on time. Here's a standard format you can follow: 1> Subject Line: Make it clear and concise. Discover how to craft effective invoice email templates that ensure quicker payments and keep clients uptodate with their account status. Invoice emails should be clear, concise, and easy for the client to understand. Follow Up Politely: Begin with a friendly and polite follow-up email. Mention the invoice number, date, and amount due. Send professional invoice email to your clients with this comprehensive guide.