Otherwise find clients who will pay you on time. They are fully customizable printable and come in various styles of designs. 30 Best Debt Collection Letter Templates Templatearchive Include a copy or link to the invoice for prompt payment. . Having Invoice Cloud available to our customers has increased our on-time payments. Its better to send a reminder notice sooner rather than later. This letter escalates the severity of the late payment. To get started you will need to have your Merchant Identification Number MID or your Lease account number that was provided in your letter. Collection starts when you send the invoice which should have a due date for payment. This email needs to be more firm in tone. Once you receive written notice of the debt you have 30 days to request validation of the debt. Thanking your customers for paying their invoices is an incredibly powerful manoeuvre. In this collection we ...