Undertakings in Australia and the promise that can bind your business

An undertaking is a promise to do something, or to not do something. In Australian business, the word covers everything from a casual line in an email to a formal document filed with a court or accepted by a regulator such as the ACCC.

The difference matters because some undertakings are legally binding and some are not, and the line between them is not always obvious. An undertaking can bind you as a contract, as a promise to a court, or as an enforceable commitment to a regulator. In this guide we explain the main types of undertaking, when each one can be enforced, and the mistakes that turn a well-meaning promise into a costly legal problem.

An undertaking generally appears in one of three settings:

• Commercial: a promise to a customer, supplier, investor or other business, usually in an email, letter or contract.
• Court: a promise made to a judge during litigation, often to avoid an injunction.
• Regulatory: a written commitment accepted by a regulator such as the ACCC, ASIC or the OAIC to resolve a compliance concern.

The legal weight of each type is different, so it helps to know which one you are dealing with before you agree to anything.

What makes an undertaking legally binding

Whether an undertaking binds you depends on who it is given to and how it is documented, not on the word "undertaking" itself. In a commercial setting, a promise becomes a contract when the usual elements are present: an offer, acceptance, something of value exchanged, and an intention to create legal relations. A promise that meets those tests is enforceable even if it sits in a short email rather than a formal agreement.

A commercial promise that falls short of a contract is not automatically free of consequences. If the other party relies on your promise to their detriment, a court can sometimes hold you to it through the doctrine of promissory estoppel, and a careless promise can also expose you to a claim for misleading conduct. In practice, the safest assumption is that a clear promise the other side relied on may be enforceable, whatever you call it.

Undertakings given to a court or a regulator operate on a different basis. They do not need consideration or a bargain between two parties. They are binding because of the body that accepts them, and the consequences of breaking them are usually more serious.

Court undertakings: promises to the judge

When your business is in litigation, you may be asked to give an undertaking to the court itself. This commonly happens instead of an injunction: the other side agrees not to seek an urgent court order if you formally promise not to do the thing they are worried about, such as using confidential information or continuing a marketing campaign.

An undertaking to the court is treated as seriously as a court order. If you break it, the court can deal with the breach through contempt proceedings, which can carry fines, costs orders and other sanctions. The Federal Court has examined whether a party gave an undertaking to the court and whether it later resiled from it in Village Building Co Ltd v Airservices Australia (No 2) [2008] FCA 1285, which shows how seriously the courts take these promises.

Because the stakes are high, a court undertaking should be drafted as precisely as any order. Vague language that seemed harmless on the day can become a trap months later when the other side argues it covers conduct you never intended to promise away.

Regulatory undertakings: promises to the ACCC, ASIC and the OAIC

Regulators commonly resolve investigations by accepting a written undertaking from the business concerned. This avoids drawn-out court proceedings while still addressing the regulator's concerns.

The best-known example is the ACCC's power under s 87B of the Competition and Consumer Act 2010 (Cth). The ACCC may accept a written undertaking from a business in connection with a matter where it has a power or function under the Act, which includes the Australian Consumer Law. A typical undertaking commits the business to stop certain conduct, publish corrective notices, refund affected customers, implement a compliance program, and report to the ACCC within set timeframes.

The key feature of a s 87B undertaking is that it is court enforceable. If the ACCC considers that a term has been breached, it can apply to the court, which may order the business to comply, to pay the Commonwealth any financial benefit obtained from the breach, and to compensate people who suffered loss. The business can only withdraw or vary the undertaking with the ACCC's consent.

ASIC has the same enforcement power for matters within its functions under s 93AA of the Australian Securities and Investments Commission Act 2001 (Cth), and the OAIC can accept enforceable undertakings for breaches of the Privacy Act, enforced through the regulatory powers framework under s 80V of the Privacy Act 1988 (Cth). The OAIC may also publish an accepted undertaking on its website, so a compliance failure can be public as well as costly.

Two practical points follow. First, giving an enforceable undertaking is not an admission of liability in itself; the legislation does not treat it as one. But the document can record agreed facts, and its wording decides what you are conceding. Second, the terms are usually detailed and time limited, so they need to match your operational reality before you sign. Negotiating the scope of an undertaking is normal, and a regulator will expect the business to have taken advice.

Worked example: a wellness brand's refund promise

Consider a Melbourne skincare brand that advertised a serum as clinically proven to reduce wrinkles. The evidence behind the claim is thin, and the ACCC starts investigating whether the advertising is misleading. Rather than defend court proceedings, the brand offers an enforceable undertaking. It promises to publish corrective notices on its website, offer refunds to customers who bought the serum in the past 12 months, run a compliance program for substantiating future claims, and report to the ACCC every six months.

The ACCC accepts the undertaking, and for a while everything runs to plan. Then the refund program falls behind, a reporting deadline is missed, and a follow-up audit shows the brand is still using similar claims in its influencer marketing. The ACCC applies to the court. The court can order the brand to comply with the undertaking, pay the Commonwealth the financial benefit obtained from the breach, and compensate customers who lost money. What looked like a cooperative promise is now a court order, with all the cost and publicity that follows.

The same logic applies to court undertakings. A promise made to a judge to pause a marketing campaign while a branding dispute is investigated is enforceable as if it were an order, and a breach can be dealt with as contempt. The setting changes, but the pattern does not: once a promise is accepted by a court or regulator, it is a legal instrument, not a goodwill gesture.

Common misconceptions about undertakings

Several misconceptions cause real trouble for small businesses dealing with undertakings:

• "An undertaking is just a promise, so nothing happens if I break it." This is wrong for court and regulatory undertakings, where enforcement is direct: contempt proceedings for a broken court undertaking, and court orders for a breached regulator undertaking. Even a commercial promise can become enforceable through contract law or estoppel if the other side relied on it.

• "It only counts if it is in writing." Court and regulatory undertakings must be written and formal, but in a commercial setting a verbal promise can form a binding contract if the elements are present, and a relied-on promise can ground an estoppel. The absence of a document is not a shield.

• "Once I give an undertaking, I can change my mind." Only with consent. Under s 87B(2) of the Competition and Consumer Act, an undertaking can be withdrawn or varied only with the ACCC's agreement, and the same applies to ASIC under s 93AA. Resiling from a promise given to a court is itself a problem.

• "An undertaking to a regulator means I have admitted fault." Not automatically. The legislation does not make giving an undertaking an admission, but the document may include agreed statements of fact, so what you concede depends entirely on the wording.

• "If my promise is vague, it can't be enforced against me." Vagueness is a risk, not a protection. If the other side relies on an ambiguous promise, you may face a costly dispute about what it meant, even if you ultimately win. And under the Australian Consumer Law, promising a product or service outcome you cannot deliver can itself be misleading conduct.

When a lawyer should review an undertaking

Professional help is usually needed in these situations:

• before giving or responding to a court undertaking, because the consequences of breach include contempt;
• before offering an enforceable undertaking to a regulator, because the terms, timeframes and reporting obligations become binding and court enforceable;
• when a commercial undertaking is important but vague, open ended, or inconsistent with an existing agreement;
• when there is any doubt about who has authority to bind the business, since an unauthorised promise can still create exposure.

A lawyer's role here is practical. They will check that the promise is specific about the action, the deliverable and the standard required; that timeframes build in realistic buffers; that conditions and assumptions are written in; and that there is a mechanism for varying the commitment if circumstances change. When dealing with a regulator, they will negotiate the scope of the undertaking, make sure any agreed statements of fact are accurate, and advise on what the reporting obligations will demand of your team. The cost of that review is usually small compared with the cost of a court application to enforce a promise you could not keep.

Ask who can enforce it

Before you agree to any undertaking, the question worth asking is not whether it feels like a big deal, but who can enforce it. If the promise is to a court, or is accepted by a regulator, the enforcer is a court with real powers, and the undertaking is a legal document no matter how informally it was discussed. If the promise is commercial, assume the other side may rely on it, and make sure it says what you mean and can actually be done.

Most costly undertaking disputes start with a promise that was meant to keep things moving. The fix is not to avoid promising anything, it is to know, before you promise, what will happen if you cannot deliver. If the answer includes a court order, get the wording reviewed first.