Unpaid Invoices in New Jersey: When a Customer Won’t Pay
The records that matter when a commercial customer disputes an overdue bill
By Peter J. Lamont, Esq.
The invoice is sixty days overdue. Your customer has stopped answering the accounts receivable emails, but someone at the company still promises that payment is coming. Then a different explanation arrives: the shipment was incomplete, the price was wrong, or the person who approved the order supposedly lacked authority. You now have a contract dispute to evaluate, even if your accounting system still calls it an unpaid balance.
Collecting unpaid invoices in New Jersey begins with the agreement and the evidence of performance. A bill shows what your business requested. The underlying records help establish why the customer owes it. Before sending a more aggressive demand or filing a lawsuit, it is worth finding out whether those records tell the same story as your account statement.
Start with what the customer actually agreed to buy
Pull the purchase order, accepted proposal, signed agreement, and any messages that changed the order. Identify the customer’s correct legal name. A store’s sign or a familiar trade name may differ from the company that placed the order. If several affiliated companies were involved, your lawyer needs to know which one agreed to pay and which one received the goods.
Read the payment terms alongside the invoice. Was payment due on delivery, after inspection, or thirty days after an approved invoice? Did the customer agree to a deposit or a progress payment? An invoice generated after the transaction may contain language the customer never accepted. Do not assume that adding a late charge, collection fee, or attorney fee line makes that amount recoverable.
Contract revisions deserve the same attention. A salesperson may have approved a discount in an email while the accounting department continued billing the original price. A revised order may have removed items that still appear on the final invoice. Resolving those inconsistencies before making a demand protects your credibility and can prevent a manageable billing problem from becoming an expensive dispute.
Sales of goods have rules that service invoices may not
New Jersey’s Uniform Commercial Code includes specific rules for transactions in goods. N.J.S.A. 12A:2-102 establishes that scope. A business selling inventory should therefore consider rules that may not govern a consultant’s unpaid service fee. Agreements that combine equipment and substantial services require closer analysis. Calling every transaction an invoice collection matter can obscure the law that actually applies.
For accepted goods, N.J.S.A. 12A:2-607(1) requires the buyer to pay at the contract rate. Section 12A:2-709 permits a seller, in specified circumstances, to recover the price when the buyer fails to pay as it becomes due. Accepted goods are one of those circumstances. The statute also addresses certain goods lost or damaged after the risk of loss passed and identified goods that cannot reasonably be resold. Those provisions have conditions; they do not make every unpaid invoice an automatic claim for the full price.
That distinction matters when the goods remain in your warehouse. A customer’s cancellation does not necessarily entitle you to invoice the entire order and dispose of the goods however you choose. Section 12A:2-709 addresses goods still under the seller’s control and credits for resale proceeds. Counsel should review the appropriate remedy before the business resells a custom order or demands a price that its records cannot support.
Keep the delivery evidence attached to the account
A signed delivery receipt can be useful, but it is only part of the file. Match the receipt to the order number, the items shipped, and the location. Save carrier tracking, packing lists, photographs, and messages confirming arrival. If the customer collected the goods, identify who picked them up and how your business recorded the handoff. Employees who remember the transaction may leave before a lawsuit is filed.
Separate delivery from acceptance when discussing the facts with counsel. A package can arrive and still be the subject of a timely rejection or another legitimate dispute. Conversely, a customer may have used or resold the merchandise before complaining about the bill. Those details deserve attention. A spreadsheet that says “delivered” rarely answers all of the questions that the customer’s attorney will ask.
Consider a supplier that ships fifty fixtures and receives payment for thirty. The remaining dispute could concern twenty defective fixtures, a promised credit, or an incorrect assumption that the entire order was paid. The useful record connects each shipment and credit to the amount demanded. Sending the same total balance repeatedly does little to resolve a disagreement about individual items.
A complaint about quality does not answer every payment question
Acceptance does not, by itself, eliminate every remedy for nonconforming goods. N.J.S.A. 12A:2-607 distinguishes the obligation to pay for accepted goods from the buyer’s remaining remedies. It also requires a buyer to notify the seller of a breach within a reasonable time after discovering it or when it should have been discovered. The timing and content of the complaint can therefore matter.
Save the first complaint in its original form. Was the customer reporting damage immediately, asking for a replacement weeks later, or raising a new objection after collection efforts began? Preserve your response as well. An offer to inspect or replace an item may be relevant to understanding the dispute. Your lawyer should see the entire exchange, including messages that are less favorable to your position.
Avoid treating the absence of a formal complaint form as conclusive. Business customers often report problems by text or through an employee who does not work in accounting. Search the relevant sales and service records before stating that nobody complained. A demand letter that overlooks an existing complaint can give the other side an easy response and distract from the amount legitimately owed.
Make the demand specific enough to answer
An effective demand identifies the agreement, explains the calculation, and addresses known credits or disputes. Attach the documents that clarify the obligation without burying the customer in unrelated records. If the customer has promised installments, preserve that exchange and determine whether the proposed arrangement changes any existing rights. A settlement should be documented carefully enough that another employee can understand what was agreed.
It is also sensible to investigate practical recovery. A successful lawsuit may still leave collection work to do. Counsel can evaluate the claim, the available information about the customer, and the likely expense before the business commits to litigation. Do not assume that a company owner personally owes the company’s invoice merely because that owner negotiated the purchase.
The agreement may direct disputes to arbitration or require a particular notice before a claim proceeds. These provisions belong in the initial review. Our New Jersey contract practice reviews payment obligations and the language that affects enforcement. The procedural choices can influence both the cost of pursuing an account and the documents needed to support it.
Bring the whole file to the first legal review
A useful collection file includes the transaction documents, the complete account ledger, and the customer’s explanations. Add the names of employees who handled the order and a short chronology based on dated records. Keep original electronic files. Your own notes should identify uncertainty rather than fill a gap with a confident guess about what must have happened.
For a New Jersey business, the immediate question is often whether a focused demand can resolve the account or whether a contested claim needs to be prepared. Our commercial litigation practice can assess that question against the evidence. If an overdue account has turned into a disagreement over performance or payment, contact the Law Offices of Peter J. Lamont to discuss the records and the options available.
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For detailed insights and legal assistance on topics discussed in this post, including litigation, contact the Law Offices of Peter J. Lamont at our Bergen County Office. We're here to answer your questions and provide legal advice. Contact us at (201) 904-2211 or email us at info@pjlesq.com.
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About Peter J. Lamont, Esq.
Peter J. Lamont is a nationally recognized attorney with significant experience in business, contract, litigation, and real estate law. With over two decades of legal practice, he has represented a wide array of businesses, including large international corporations. Peter is known for his practical legal and business advice, prioritizing efficient and cost-effective solutions for his clients.
Peter has an Avvo 10.0 Rating and has been acknowledged as one of America's Most Honored Lawyers since 2011. 201 Magazine and Lawyers of Distinction have also recognized him for being one of the top business and litigation attorneys in New Jersey. His commitment to his clients and the legal community is further evidenced by his active role as a speaker, lecturer, and published author in various legal and business publications.
As the founder of the Law Offices of Peter J. Lamont, Peter brings his Wall Street experience and client-focused approach to New Jersey, offering personalized legal services that align with each client's unique needs and goals.
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