Outside of the amount due, the invoice number is the second most important number on your invoice. Systematically assigning a unique number to each invoice will give you an identifier for it. Use this ...

Invoice numbers are a series of unique, sequential identifiers which are included on every invoice a business sends, whether big or small. These numbers help in keeping track of sales and purchases, ...

Opinions expressed by Entrepreneur contributors are their own. If at least a third of your receivables are 60-plus days delinquent, you’re not alone. In fact, you’re one of 40 percent of small ...