Promissory note

A promissory note is a legal document that governs a debt between two parties.

Glossary
Promissory note

Explained – what is a promissory note?

A promissory note is a written instrument by which a debtor acknowledges a debt to a creditor. It is used in contract law to formalise lending arrangements and set out the terms clearly. There are two principal types: a non-negotiable promissory note, addressed to a specified creditor, and a negotiable promissory note, which can be transferred to a new creditor. To draft a promissory note that is legally robust, it can be prudent to instruct a contract lawyer.

Promissory note agreement – when does it become relevant?

The issue arises when a debt needs to be documented in writing, in both private and commercial settings. Typical scenarios include loans between family members, home financing or intercompany lending. The choice between a non-negotiable promissory note and a negotiable promissory note determines the rights and obligations that follow the instrument under the promissory note agreement.

Illustration of a promissory note agreement, showing two parties exchanging a written debt document, representing loan obligations and repayment terms.

Points to consider when you draft a promissory note

To ensure the promissory note is legally sound and practical, it must be drafted with care. Key points to consider include:

Specify clearly the debtor, the creditor, the amount of the debt and how it arose.
Set out the repayment schedule, any interest and terms for late payment.
State whether it is a non-negotiable promissory note or a negotiable promissory note.
For a negotiable promissory note: ensure safe custody of the instrument, as the holder may demand payment and assignment of promissory note rights is possible.
Avoid vague wording that could create interpretative disputes.
Have a legally qualified professional review the promissory note agreement before execution.

By structuring the document clearly, you create a reliable basis that provides certainty and can be used as evidence if required.

Promissory note

Why is a promissory note important?

A promissory note establishes clear terms around a debt and reduces uncertainty for both parties. Without a written instrument, it may be difficult to prove the existence of a loan or the applicable repayment rules.

A non-negotiable promissory note is often used for loans between related parties, as it is not intended for transfer. A negotiable promissory note is more common in commercial contexts where the debt may be transferred to other creditors. Both types are important in contract law and enhance legal certainty under any promissory note agreement.

From a trust perspective, a promissory note evidences accountability and clarity. It strengthens the relationship between the parties and supports long-term stability, whether the loan is private or business-related. Where appropriate, a promissory note as collateral can also be considered.

A non-negotiable promissory note is addressed to a specific creditor, whereas a negotiable promissory note can be transferred, giving a new creditor the right to demand payment.

When group companies lend to each other, a promissory note agreement provides clear documentation of the amount and terms. This facilitates internal governance and supports auditors reviewing the transactions.

A promissory note must be in writing and set out the amount, parties and terms. There are no mandatory formalities, but precise terms make disputes easier to resolve when they arise under the promissory note agreement.

A lawyer can ensure the promissory note is clear and enforceable, especially for larger sums or more complex loans. Key issues where advice helps include:

Choosing between a non-negotiable promissory note and a negotiable promissory note
How interest should be regulated
Consequences of non-payment
Assignment of promissory note rights and how the instrument can be transferred

Without written terms, it is harder to prove that a debt exists, which can lead to protracted disputes. The creditor risks not being repaid and the debtor may face uncertainty if the terms are challenged.

Yes, particularly a negotiable promissory note can be used as security in financing. The instrument may be pledged, providing the lender with stronger guarantees of repayment. In structured finance, a loan promissory note agreement may be combined with a pledge to achieve a promissory note as collateral.

Related concepts: what is a promissory note, what is a debt instrument, simple promissory note and the mechanics of assignment of promissory note in commercial practice.