Sending a proper invoice is one of those things that can quietly affect how a client sees you. A messy or incomplete invoice might make even a great piece of work look less credible. Most people know to include the project name and the amount, but there are other details that really make an invoice look put together, like payment terms, due dates, and your contact information. Getting this right from the beginning can save you from confusion and delayed payments later. What details do you always make sure to include in your invoices to keep things professional and clear?