As a young company, we had significant trouble with customers who were stretching the limits of their payment terms. One of them stood out head and shoulders above the rest. There was typical behaviour like not responding to reminders, promising to pay but discovering that it hadn't worked out, and so on. Finally, after waiting for yet another payment, we called in Unpaid. We closely followed the instructions for reminders, and when, after reminder three the payment again failed, we sent the file to Unpaid. It's a very simple process via the online form. A week later, the payment came in. We only had to use the services of Unpaid once, but if we are forced into a similar situation in the future, I wouldn't hesitate for a moment to call Unpaid in.