Each of your incomes and expenses should be recorded. When you receive or send money, there must be some document containing financial information about the transaction.
The common type of document to record a transaction between a company and a customer is an invoice. Given the alternatives such as checks, receipts, and bills, an invoice is presented in the law everywhere, so that is optimal.
Invoice management can be easily organized by an invoice generator. Just make sure to check that the form contains all the necessary information
. Pay special attention to numbers (have to be subsequent) and dates of an invoice. It is crucial for tracking payments and managing overdue invoices.