As a freelancer, you have to stay on of clients to make sure you get paid on time. If you pester the company, you may hear some excuses like “The check must have been lost in the mail.” or, “Can you send the invoice again? It must not have gotten to our accountant.” The best is when you don’t get a response at all, and randomly find a check a few weeks later. Chasing down payment is one of the worst parts about being a freelancer. But there are professional ways to encourage clients to pay on time.