Acknowledgement of Debt (IOU)

Overview

An acknowledgement of debt (informally an "IOU", from "I owe you") is a short written statement by a debtor confirming that a specific sum is owed to a named creditor, usually together with agreed repayment terms. It differs from a personal loan agreement in emphasis: a loan agreement is typically drawn up when the money is first advanced and focuses on the terms of the loan itself, whereas an acknowledgement of debt is often used after the fact — to formally record and confirm an existing, sometimes previously informal, debt (for example, money already lent without paperwork, an unpaid invoice, or a settled dispute over an amount owed). Legal effect and limitation: under the Limitation Act 1980, a written acknowledgement of a debt, signed by the debtor (or their agent) and given to the creditor, restarts the limitation period for bringing a claim to recover it (section 29). This is one of the most practically important uses of this document — a creditor concerned that the standard six-year limitation period for a simple contract debt (or the debt's original limitation period) is running out can ask the debtor to sign an acknowledgement, which gives the creditor a fresh six years from the date of acknowledgement in which to sue if the debt remains unpaid. When to use it: to formally record an existing debt where no adequate written record exists, to reset the limitation clock on an old debt (with the debtor's genuine agreement — a document signed under duress or without true acknowledgement of the debt will not have this effect), or simply as a lower-friction alternative to a full loan agreement where money has already changed hands and the parties just need repayment terms recorded. Key clauses: identification of the debtor and creditor, a clear statement of the amount acknowledged as owed and what it relates to (so there is no ambiguity about which debt is being acknowledged), any interest, the repayment terms, and the debtor's signature (which is what gives the document its effect under section 29 of the Limitation Act 1980 — the creditor's signature is not what matters for this purpose). Common pitfalls: a vague description of what the debt actually relates to, which can undermine its evidential value; relying on an oral acknowledgement to reset limitation, when section 29 requires the acknowledgement to be in writing and signed by the debtor to have that specific legal effect; and confusing an acknowledgement of an existing debt with a fresh loan agreement, which are conceptually different documents even though they can look similar on the page.

Information to customize

• Debtor's full name

• Debtor's address

• Creditor's full name

• Creditor's address

• Amount acknowledged as owed

• What the debt relates to (origin of the debt)

  E.g. 'a loan advanced on [date]', or 'unpaid invoice number [X]'.

• Interest on the debt (if any)

• Repayment terms

• Date of this acknowledgement

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Frequently asked questions

What is the difference between an acknowledgement of debt and a loan agreement?

A loan agreement is usually drawn up when money is first advanced and sets out the terms of the loan itself. An acknowledgement of debt is typically used afterwards, to formally confirm and record a debt that already exists — including one that was originally informal or undocumented.

Does signing this document restart the time limit for suing to recover the debt?

Yes, provided it meets the requirements of section 29 of the Limitation Act 1980 — a written acknowledgement of the debt, signed by the debtor, restarts the limitation period, giving the creditor a fresh period (generally six years for a simple contract debt) from the date of acknowledgement.

Does the creditor need to sign the document too?

No — for the acknowledgement to have its legal effect under section 29 of the Limitation Act 1980, what matters is that the debtor signs it. The creditor's signature is not what triggers the fresh limitation period, though including it is not harmful.

Can a verbal acknowledgement of a debt reset the limitation period?

No. Section 29 of the Limitation Act 1980 requires the acknowledgement to be in writing and signed by the debtor (or their agent) to have this specific legal effect on limitation.

What should the debt description include?

Be as specific as possible about what the debt relates to — for example the date and circumstances of an original loan, or the invoice number of an unpaid amount — so there is no room for dispute later about which debt is being acknowledged.

Is this document enforceable on its own if the debtor never pays?

It is strong written evidence of the debt and, if the debtor still does not pay, supports a claim for the acknowledged amount through the county court — but as with any debt, ultimate enforcement (e.g. through a County Court Judgment and subsequent enforcement action) requires following the separate legal process for recovering a judgment debt.

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