What is a memorandum of understanding (MOU)?

A memorandum of understanding (MOU) records what parties intend to do together before, or instead of, a full contract. In 2000, a developer and the owner of a company holding a Brooklyn lot signed a two-page MOU to "work together" on a new building [1]. Talks later collapsed. A federal appeals court applying New York law held that the MOU did not bind either side to build. It did bind both to negotiate the open terms in good faith [1].

This guide covers memorandums of understanding in the United States, using New York and Delaware court decisions and federal rules as examples. It is general information, not legal advice.

Several names circle the same idea. A memorandum of agreement (MOA) is often a similar document with more formality and detail [7]. A letter of intent (LOI), a term sheet, and heads of terms usually record deal terms before a purchase, loan, or license. The label decides less than you might expect. Under a US federal rule on international agreements, the title "will not be determinative", whether the paper is called an agreement or a memorandum of understanding [5]. US courts take a similar view of private deals: they read the words, the context, and what the parties did next [1].

Memorandum of understanding: purpose and uses

An MOU puts a shared plan in writing while the details are still open. It is useful when the parties want alignment now and commitment later.

Common uses include:

• Pre-deal frameworks. Two companies agree on the outline of a venture, a license, or a supply relationship before lawyers draft the definitive agreement.
• Research and academic collaborations. Georgia Tech's legal office describes MOUs as useful "in the early stages" for clarifying intentions and setting a preliminary framework [7].
• Program participation. Some government programs use an MOU as the participation contract itself. Every US employer that uses E-Verify must sign the E-Verify MOU with the US Department of Homeland Security (DHS) and the Social Security Administration (SSA) [6].
• Agreements between public bodies. Agencies and governments record cooperation in MOUs, both at home and abroad [5].

Those uses do not share one legal effect. Georgia Tech's policy treats its own MOUs as non-binding and without financial obligations, and it says contracts are "generally favored" when terms are definite [7]. The E-Verify MOU is the opposite case. The official E-Verify website describes it as "a legally binding contract when properly executed (i.e., signed) by all the parties" [6].

So "is an MOU binding?" has no single answer. The better question is what this particular document says and what the parties intended.

When an MOU is enough

An MOU is often enough when no money changes hands, each party can walk away without harm, and the goal is coordination rather than enforcement. A joint event, a referral arrangement, or an exploratory research partnership often fits.

It is usually not enough when one side will spend money, hand over confidential information, turn down other offers, or start work. Those are the moments a party will later want a court to enforce something. If the obligation matters, put it in a contract or in a clause the MOU clearly marks as binding.

It helps to write each obligation as its own clause before you decide which document holds it.

Memorandum of understanding: parties

The parties to an MOU are the people or organizations whose intentions it records. Most MOUs have two parties. Collaborations, consortiums, and public programs can have more. The E-Verify MOU, for example, has three: the employer, DHS, and SSA [6].

Each party has the same basic responsibilities:

• Identify itself exactly. Use the full legal name of the entity that will carry out the plan. In the Brooklyn case, one side signed for himself "and his companies, entities, etc." [1]. That phrasing leaves open which entity holds which right.
• Sign with authority. The person signing should have authority to commit the organization to whatever the MOU does bind. Georgia Tech, for example, points staff to its signature authority rules before they sign an MOU [7].
• Know its own role. A good MOU says who contributes what. In the Brooklyn MOU, the landowner was to provide the property at no cost. The developer was to lead the rezoning, design, budgeting, and financing work, and to front development costs up to $175,000 [1].
• Name a contact. Someone on each side should own the relationship and the next steps.

Government parties bring their own rules. A US federal agency that signs an MOU with a foreign government may be making an international agreement. Under US State Department rules, that depends partly on whether the parties intend to be legally bound under international law, and not on the document's name [5].

Memorandum of understanding: key clauses

A well-drafted MOU reads like a short contract with one extra clause that decides how much of it binds. The table summarizes the usual sections. The explanations follow.

Clause	What it records	Binding?
Purpose and scope	The shared goal and its limits	Usually not
Roles and contributions	Who does and provides what	Depends on wording
Binding effect	Which sections bind and which do not	Should say so expressly
Next steps	The definitive agreement and target dates	Often a duty to negotiate
Confidentiality and exclusivity	Information handling and no-shop periods	Usually drafted to bind
Costs	Who pays what during the process	Should say so
Term and termination	Start, end, and how to exit	Should say so
Governing law and signatures	Which law applies and who signs	Yes, if it is a contract

Binding-effect clause

This is the most important clause in an MOU. Federal courts applying New York law sort binding preliminary agreements into two types [2].

• The first type is complete. It reflects agreement on "all the issues perceived to require negotiation" and binds both sides to the final deal, even though a formal document is still to come [1].
• The second type, a "binding preliminary commitment", settles some major terms and leaves others open. Under New York law as applied by federal courts, it does not commit the parties to the final deal. It commits them to "negotiate the open issues in good faith" within the agreed framework [2].

Under that New York framework, a binding preliminary commitment bars a party from "renouncing the deal, abandoning the negotiations, or insisting on conditions that do not conform to the preliminary agreement" [2]. It does not guarantee that a final contract will be signed [2].

To decide whether a document binds the parties to the final deal, the US Court of Appeals for the Second Circuit looks at four factors under New York law. These are an express reservation of the right not to be bound without a final writing, partial performance, whether all terms are agreed, and whether this type of contract is usually put in writing [1]. The same court notes a "strong presumption" against a binding obligation when an agreement has open terms, calls for future approvals, and expressly anticipates future contract documents [1].

Federal courts number these as types. New York's highest court has said it does not find "rigid classifications into 'Types'" useful [3]. In a 2009 case, it asked instead whether the agreement contemplated later agreements and whether signing them was a precondition to performance [3]. The practical lesson under New York law is the same either way: write down which parts bind.

Purpose, roles, and next steps

State the shared goal in one or two sentences. Then list each party's contributions. If the parties intend to sign a definitive agreement, name it and give a target date.

Be deliberate with verbs. The Brooklyn MOU said the parties would "work together", which the Second Circuit read as clear evidence of an intent to be bound to the MOU as a framework, under New York law [1]. If you want only a statement of intent, say that the section is not binding.

Confidentiality, exclusivity, and costs

These clauses protect a party while talks continue. They only help if they bind. If your MOU is otherwise non-binding, say expressly that these sections are binding, and give each one an end date.

In one Delaware case, a signed bridge loan agreement required the parties to negotiate a license in good faith on the basis of a term sheet and imposed a 90-day exclusivity period [4]. The term sheet itself carried a "Non Binding Terms" footer [4]. That did not stop the good-faith duty in the signed agreement from applying.

Term, termination, and governing law

Give the MOU an end date or a review date. Say how a party can withdraw and how much notice it must give. Name the governing law, especially when the parties sit in different states or countries.

Before signing, it helps to run the draft through a contract review tool that flags key dates, obligations, and unusual clauses. Treat its output as a checklist for your own reading, not as legal advice.

Dates and lifecycle events

An MOU has fewer dates than a long contract, but the ones it has are easy to lose. Most of them sit at the start or the handoff to the definitive agreement, as Contracko's overview of the contract lifecycle describes.

Track these events:

• Signature and effective date. They can differ. Record both, and note whether all parties have signed. The E-Verify MOU, for example, is binding "when properly executed (i.e., signed) by all the parties" [6].
• Target date for the definitive agreement. If the MOU sets one, diarise it with a reminder well before it arrives.
• Exclusivity and confidentiality end dates. These often expire on a fixed day or a set number of days after signing, like the 90-day period in the Delaware case [4].
• Review dates. Long-running collaborations should be reviewed on a schedule, for example every year.
• Expiry or renewal. Some MOUs end on a date. Others continue until a party gives notice. If yours renews, track it like any contract renewal.
• Termination notice. Record the notice period and the address for notices.
• Supersession. When the definitive agreement is signed, record that it replaces the MOU. Check whether any MOU clause, such as confidentiality, survives.

Contracko's guide to contract dates and auto-renewals shows how to record start, end, and notice dates so reminders fire on time.

Risks and common mistakes

Most MOU disputes start with a mismatch between what one party thought the document meant and what it says. These are the common mistakes, each tied to a real consequence.

Assuming the title makes it non-binding. Neither US courts nor the US State Department decide effect by title alone [1] [5]. If you want a non-binding MOU, say so in a clause, and avoid language of firm commitment elsewhere.

Forgetting that a duty to negotiate can bind. Under New York law as applied by federal courts, a binding preliminary commitment bars a party from abandoning negotiations or demanding terms outside the agreed framework [2]. In Delaware, the state supreme court in 2015 upheld an award of about $113 million in expectation damages. The defendant had negotiated in bad faith a license it had agreed to negotiate in good faith [4].

Treating good faith as a promise to close. A good-faith duty does not guarantee a deal. In the 2009 New York case, the parties negotiated open terms on and off for almost three years without signing, and the court found no breach [3].

Starting work on the strength of an MOU. Partial performance is one factor the Second Circuit weighs under New York law when deciding whether a preliminary agreement binds the parties to the final deal [1]. Spending money before the definitive agreement can create a dispute that neither side planned for.

Leaving the MOU open-ended. An MOU with no end date, no review date, and no exit clause can outlive everyone who negotiated it. Without a date, nobody is prompted to renew, replace, or end it.

Losing track of it. MOUs are often signed outside the normal contract process, by a project lead or a department head. They then sit in an inbox or a shared drive. That is a contract risk management problem, and it is easy to prevent.

Contract-management checklist

Treat a signed MOU as a contract record, even if most of it is not binding. Contracko's contract repository guide explains how to keep agreements in one searchable place.

Capture these fields

1. Full legal names of all parties and the people who signed.
2. Whether each party has signed, with the signature date and effective date.
3. Which clauses are binding and which are not, quoted from the document.
4. The governing law.
5. Each party's contributions and named contacts.
6. The planned definitive agreement and its target date.
7. A link to the definitive agreement once it exists, and the clauses that survive.

Diarise these dates

8. The target date for the definitive agreement, with a reminder at least 30 days before.
9. Exclusivity and confidentiality end dates.
10. The MOU's expiry, renewal, or review date.
11. The notice deadline for withdrawal or non-renewal.

Review on a cadence

12. Every quarter, list open MOUs with no definitive agreement and decide to proceed, extend, or end each one.
13. Every year, check that contacts and signatories are still current.
14. When the definitive agreement is signed, mark the MOU as superseded and close its reminders.

You do not need to retype these fields by hand. Contracko's contract data extraction turns uploaded agreements into structured data, including parties, dates, renewal terms, and notice periods. For a wider routine, see these contract management best practices.

Contracko keeps contracts, files, and metadata in one place, and its AI reads each agreement to surface important dates and terms. Expiration reminders track renewal, end, and notice dates, as well as custom events like obligations or milestones, and you can assign notifications to colleagues. There is a free trial, no credit card required.

Sources

[1] US Court of Appeals for the Second Circuit, Brown v. Cara, 420 F.3d 148 (2005) (a two-page MOU binding as a framework to negotiate in good faith under New York law; the four factors). static.case.law/f3d/420/html/0148-01.html

[2] US District Court for the Southern District of New York, Teachers Insurance & Annuity Ass'n v. Tribune Co., 670 F. Supp. 491 (1987) (the two types of preliminary agreement and what a good-faith commitment bars). static.case.law/f-supp/670/html/0491-01.html

[3] New York Court of Appeals, IDT Corp. v. Tyco Group, 13 N.Y.3d 209 (2009) (later agreements as preconditions; no breach after years of unsuccessful negotiation). static.case.law/ny3d/13/html/0209-01.html

[4] Delaware Supreme Court, SIGA Technologies v. PharmAthene, 132 A.3d 1108 (2015) (expectation damages for bad-faith breach of a duty to negotiate a license on a term sheet). static.case.law/a3d/132/html/1108-01.html

[5] US Department of State, 22 CFR 181.2 (criteria for international agreements; intent to be bound; title not determinative). ecfr.gov/current/title-22/chapter-I/subchapter-S/part-181/section-181.2

[6] E-Verify, What is the memorandum of understanding (MOU)? (the employer, DHS, and SSA agreement; binding when signed by all parties). e-verify.gov/faq/what-is-the-memorandum-of-understanding-mou

[7] Georgia Institute of Technology, Legal Affairs, Memorandums of Understanding (MOUs) (institutional uses and its non-binding policy). generalcounsel.gatech.edu/legal-affairs/memorandums-understanding-mous

Images in this article were generated with the assistance of AI.