A dunning letter is a written demand sent to a customer whose invoice is past due, asking for payment and stating what happens if it does not arrive. Dunning is the older word for the act of pressing for payment, and a dunning notice, a collection letter and a past-due notice all name the same document.
It is a business communication rather than a legal instrument. Nothing about the word gives it force, and the letter that gets paid is the one that is specific enough for the recipient to act on without a phone call.
What Belongs in One
Six things, and the omission of any of them is what turns a letter into a phone call.
The invoice number and date, so the recipient can find it. The amount outstanding, stated on its own rather than as part of a running balance. The date it became due, and the terms it was issued on. Any partial payments already received against it, because a customer who has paid something and is asked for the whole amount will stop reading. How to pay, with the detail needed to do it that day. And what happens next, with a date attached.
The last one is where most letters fail. “Please remit at your earliest convenience” sets no date and threatens nothing, so it is easy to file. A named date and a named consequence give the recipient a reason to act this week rather than next month.
The Series, Not the Letter
Dunning works as a sequence with escalating specificity, and the escalation is in what the letter commits to rather than in its tone.
The first is a reminder, usually days after the due date, written on the assumption that it was missed rather than refused. The second states the age of the balance and asks for a payment date. The third names the consequence: work paused, account placed on hold, or the file passed to a third party. The last one is a final notice, and it should only ever be sent by a business that will actually do what it says.
A series that threatens the same thing three times and never does it teaches the customer that the letters are noise. That is the most expensive mistake in the sequence, and it is free to avoid: only write consequences you intend to carry out.
Whether Federal Collection Law Reaches Your Letter
This is the question a firm gets asked and the one most templates ignore, and it turns on who is owed the money rather than on how the letter is worded.
The Fair Debt Collection Practices Act reaches a debt collector, and the definition excludes an officer or employee of a creditor while, in the name of the creditor, collecting debts for that creditor (15 U.S.C. 1692a(6)). A business pressing for what is owed to itself, in its own name, therefore usually sits outside the Act. Whether an outside provider crosses into the definition is a separate test with its own carve-outs, worked through in accounts receivable outsourcing companies.
Once it does cross, the first letter acquires required content. Within five days after the initial communication with a consumer in connection with the collection of any debt, a debt collector must send a written notice containing the amount of the debt, the name of the creditor to whom it is owed, and a statement that unless the consumer disputes it within thirty days after receipt the debt will be assumed valid (15 U.S.C. 1692g(a)).
Two limits are worth stating plainly. The Act is built around consumer debts, so a business-to-business balance is a different question. And this is a summary of two statutory sections rather than advice on a particular letter, which is a matter for counsel where a collection program is being designed.
What a Dunning Series Does Not Fix
A letter reaches a balance that already exists. It cannot reach the decision that created it.
Where the same customers are chased every quarter, the problem is upstream: terms granted without a credit check, invoices issued late, or work continued while an earlier balance aged. The letter is treating the symptom, and the measure that shows whether the underlying collection cycle is actually moving is days sales outstanding, not the count of letters sent.
The other thing it does not fix is the accounting. A balance that is not going to be collected is recognized through the allowance for doubtful accounts whether or not another letter goes out, and continuing to dun a balance already provided for changes nothing on the statements.
Common Questions
No. It is a demand for payment, not a filing, and it creates no rights on its own. What it can do is evidence that demand was made, which matters later if the balance is written off or pursued, so the copy kept on file is worth as much as the copy sent.
As many as the sequence needs to reach a decision, and no more. Three or four is a common pattern because it gets from reminder to consequence without the series becoming background noise. A fifth letter that repeats the fourth is evidence that the process has no next step, which is a policy problem rather than a writing problem.
A statement lists activity and shows a balance. A dunning letter asks for a specific overdue amount and names what happens if it is not paid. Sending a statement and expecting it to work as a demand is a common substitution, and it fails for the same reason a bank statement never gets anyone to act.
Accountably places trained offshore accountants and tax preparers inside US CPA and EA firms, and a firm can put a real block of its own invoice-to-cash work through a trial task before anything client facing depends on it.
