It’s an unfortunate, yet common, problem. A customer fails to pay their bill in accordance with the agreed upon payment terms. Despite gentle reminders via phone, email and even snail mail, the invoice remains unpaid, leaving you with what feels like last-ditch options. You could hire a collection agency (but their fees will bite into your profit), or send a demand letter threatening legal action (but they all look the same and never seem to work). Finally, you could choose (perhaps begrudgingly) to write off the debt.