If your clients are not paying on time, the first step to take is to have a proper accounts receivable program in place.This starts with a clear invoice that is timely mailed to your customer.
It also includes regular reporting and tracking of clients who are past due. This includes a series of follow-up steps when a client is late. Following this sort of program is the most efficient and cost-effective way to make your clients pay on time.
At the end of that program, there should be a step that indicates we are going to engage a collection attorney. At that point the collection attorney takes over. If you follow the previous steps, which also includes having a properly drafted contract laying out the payment responsibilities and the responsibilities of the parties, that gives your collections attorney the best chance of enforcing the agreement and collecting your money and should you have to sue, provides the best foundation for winning that lawsuit.