Welcome to the ultimate invoicing guide. Find the most comprehensive information about invoices: different types and their purposes, how to create invoices, what to include and how to structure them. Learn how to send physical invoices and modern online alternatives. In our guide we combined invoicing essentials and step-by-step guidelines that are clear and easy to follow regardless of the level of your financial expertise. Whether you are a business owner, an accountant or a freelancer, here you will find how to create professional invoices to make sure that all your efforts are being paid for in the most efficient manner.