Ambiguous: "Please settle the outstanding balance as soon as possible. Write a Formal Demand Letter in Harris County for requesting money, possession of assets, or action on a matter.Follow these 10 tips to write overdue payment letters for requesting outstanding payments from your late paying customers. Subject: Request for Payment of Outstanding Invoices. This letter should contain a short and concise account of the payment dispute. Please let us know immediately when you plan to send payment. Yes, the type of TABC permit or license determines whether sales of malt beverages and wine are subject to sales tax or mixed beverage taxes. Before you pay any debt to any collector, confirm that the debt is real and valid. And be on the lookout for the signs of a debt collection scam.