Two familiar scenarios
Consider a Monmouth County marketing agency that delivered three months of work to a client who has now stopped paying, claiming the results were disappointing. Or a small manufacturer whose supplier missed two delivery dates in a row, forcing it to buy parts elsewhere at a higher price. Both owners feel wronged, and both are tempted to act immediately: cut off the client, cancel the supplier, post a scathing review.
Each of those moves could backfire. The client might argue the agency breached first by stopping work. The manufacturer might lose the right to recover its extra costs if it terminates the wrong way. The steps below are designed to keep your claim intact while you work toward getting paid or getting what you bargained for.
Step one: read what the contract actually says
Before you respond, reread the agreement and every amendment, order form or statement of work. Focus on:
- The exact payment, delivery and performance obligations on each side
- Notice and cure provisions, which may require written notice and a chance to fix the problem before you can claim default
- Termination rights and what happens to unpaid amounts on termination
- Dispute resolution steps, such as mandatory negotiation, mediation or arbitration
- Governing law, venue and attorney's-fee clauses
- Limits on damages and exclusions of lost profits
Skipping a required notice step is one of the most common ways a strong claim becomes a weak one. If there is no written contract, the emails, quotes and invoices may together form the agreement, and for sales of goods the Uniform Commercial Code fills in many gaps.
Evidence file
Gather and preserve these records
Start a single folder, physical or digital, and keep everything in it. Do not delete or edit anything, even messages that seem unhelpful.
- The signed contract, amendments and any incorporated terms
- Purchase orders, quotes, change orders and invoices
- Delivery receipts, shipping records, timesheets or proof of completed work
- Every email, text and messaging-app conversation with the other party
- Notes of phone calls, with dates and who said what
- Records of your losses: replacement costs, overtime, lost orders and late fees
A dated timeline written now, while memories are fresh, is often the most useful document in the file.
Keep performing, carefully, until you know your rights
Not every breach lets you walk away. As a general rule, a minor breach entitles you to damages but not to stop performing; a material breach, one that goes to the heart of the bargain, may justify suspending performance or terminating. Which side of that line a particular failure falls on is fact-specific and often disputed.
If you stop work, withhold delivery or terminate without a clear right, you risk becoming the party in breach. In sales of goods, the UCC can let a party who has reasonable grounds for insecurity demand adequate assurance of performance in writing before deciding what to do. Get advice before you change course, and in the meantime document any performance you continue to provide.
Keep in mind the related principle of mitigation: a party harmed by a breach is generally expected to take reasonable steps to limit its losses, such as finding a replacement supplier. Damages that could reasonably have been avoided may not be recoverable.
Send a formal demand
A well-prepared demand letter identifies the contract, describes the breach in neutral factual terms, states exactly what you want (payment of a sum, delivery by a date, a cure of a defect), sets a reasonable deadline, and reserves all of your rights. It should satisfy any notice clause in the contract and be sent by the method that clause requires.
Many disputes resolve at this stage. A letter that shows you understand the contract and have the documents to back your position often prompts a payment plan or a negotiated fix. Avoid exaggerated threats or claims you cannot support; the letter may end up as an exhibit.
If the demand does not work
Your options then depend on the size of the claim, the contract and whether the relationship is worth preserving:
- Negotiation or a payment plan, documented in a written settlement with a release
- Mediation, a confidential, non-binding process that often resolves business disputes faster and more cheaply than court
- Arbitration, if the contract requires it
- A court action, in the Special Civil Part of the Superior Court for smaller claims within its monetary limit, or in the Law Division for larger ones
Watch the calendar. New Jersey generally allows six years to sue on a contract and four years for sale-of-goods claims under the UCC, but a contract can shorten that period and the start date can be disputed. The firm's guide to the New Jersey statute of limitations for business debt explains the rules. For unpaid invoices specifically, see commercial debt collection support; for disputes over performance, the firm's breach of contract practice covers damages and defenses. Both sit within the firm's wider business dispute resolution services.
For next time, the best protection is upstream: clear written contracts, deposits or milestone payments, credit checks on large accounts, and a personal guarantee where the customer's credit is thin.
Questions & answers
Breach of contract questions
Do I need a lawyer to send a demand letter?
Not legally. But a letter from an attorney tends to be taken more seriously, and it avoids common mistakes such as missing a contractual notice requirement, making statements that weaken your position, or demanding amounts you cannot recover. For a meaningful claim, attorney review is usually worth the modest cost.
Can I recover my attorney's fees?
Only if the contract contains a fee-shifting clause or a statute provides for fees. Otherwise, each side generally pays its own lawyers, even if you win. That rule should shape your strategy: when fees are not recoverable, an early negotiated resolution often makes more financial sense than a long fight.
The customer says our work was defective. Should I keep chasing payment?
Take the complaint seriously but do not abandon the claim. Review the contract's acceptance, warranty and inspection terms, gather proof of what you delivered, and respond in writing. A documented offer to address specific defects, paired with a demand for the undisputed balance, often moves things forward.

