Lapping Schemes: How Receivables Fraud Stays Hidden

If you've ever heard the phrase "robbing Peter to pay Paul," you already understand the basic mechanics of a lapping scheme. It's one of the most common forms of receivables fraud, and it's also one of the most deceptively simple. A lapping scheme works by stealing one customer's payment and then using the next customer's payment to cover the shortfall, so the books never show anything obviously wrong. As a forensic accountant, I spend a lot of time explaining how this kind of receivables fraud actually functions, because understanding the mechanism is the first step toward stopping it.

What Is a Lapping Scheme?

At its core, a lapping scheme is the receivables version of juggling. Someone with access to incoming customer payments steals cash or a check from Customer A and pockets it. To keep Customer A's account from showing a past-due balance, the fraudster takes the next payment that comes in, from Customer B, and applies it to Customer A's account instead of Customer B's. Now Customer B's account looks unpaid, so when Customer C sends in a payment, that money gets applied to Customer B's account. The cycle continues, always using the newest receipt to paper over the last gap.

This is why the term "lapping" fits so well. Each payment laps over the previous shortage, like waves washing over one another, and as long as new payments keep coming in, the fraud stays hidden underneath the surface.

Why Receivables Fraud Like This Is So Hard to Catch Early

What makes a lapping scheme particularly frustrating to detect is that, in its early stages, nothing looks wrong at all. Payments are coming in. Accounts are getting credited. Nothing appears to be missing, because the fraudster is always using a genuine payment to cover a genuine shortfall. The books balance, at least on paper, and there's no obvious break in the chain.

This is especially true when the same person is responsible for both receiving customer payments and posting them to the accounting system. Without a second set of eyes, there's no natural checkpoint where the mismatch would surface. As long as cash flow stays steady, the timing lines up well enough that the ledger doesn't raise any flags.

A lapping scheme isn't a single act of theft. It's a moving target that depends entirely on the fraudster never running out of new payments to cover old ones.

Why Lapping Schemes Eventually Collapse

Every lapping scheme has a built-in expiration date, because it depends on constant motion. The person running the scheme is essentially juggling, and every juggling act eventually runs out of hands. All it takes is one disruption: a customer payment that arrives late, a payment that's smaller than expected, a vacation, or someone else temporarily stepping into the role, and there's no new money available to cover the last shortfall.

Once that happens, the mismatch becomes visible. Customers start calling to ask why their accounts show past-due balances they know they already paid. The aging report stops making sense. Reconciliations that used to line up suddenly don't. The whole structure collapses precisely because it was never sustainable in the first place. It's not a question of if a lapping scheme will unravel, but when, and often it's a fairly ordinary disruption, not a dramatic discovery, that brings it down.

Internal Controls That Stop Lapping Before It Starts

The good news is that a lapping scheme is entirely preventable with the right structure in place. As someone who spends a lot of time evaluating internal controls for businesses, I can say that any one of the following measures would stop this particular fraud cold. Together, they make it essentially impossible:

• Segregation of duties. One person receives and logs incoming payments, while a different person posts them to customer accounts. No single employee can juggle receipts alone.
• Daily posting of receipts. Posting payments the same day they arrive removes the slack a fraudster needs to delay posting while waiting for the next payment to come in.
• Mandatory vacations or rotation of duties. A lapping scheme collapses the moment the person running it is away from their desk, so forced time away exposes the pattern almost immediately.
• Customer confirmations. Periodic account statements or independent balance confirmations make it impossible to keep a past-due account hidden when it should have already been cleared.
• Lockbox or direct-to-bank deposits. When customer payments go straight to the bank instead of passing through an employee's hands, the opportunity to divert them disappears entirely.

These controls aren't complicated or expensive to put in place, which is part of what makes lapping schemes so avoidable. Most businesses that fall victim to receivables fraud simply never got around to separating these duties, or trusted one long-tenured employee with too much of the process for too long.

How Forensic Accountants Approach a Suspected Lapping Scheme

When a business suspects a lapping scheme, or any other form of receivables fraud, the work of untangling it looks a lot like reconstructing a timeline. Forensic accountants trace the sequence of payments against invoice dates, bank deposit records, and posting dates to find where the pattern of "newest payment covers oldest gap" breaks down. That kind of reconstruction is closely related to how forensic accountants track down hidden assets in other types of cases: it's methodical, document-driven work that follows the money rather than assumptions.

This is also why lapping schemes belong squarely in the world of fraud investigations, rather than a routine internal review. Untangling months or years of misapplied payments requires rebuilding customer account histories from source documents, not just looking at what the current ledger shows.

Protecting Your Business Starts With the Right Controls

A lapping scheme thrives on trust, timing, and a lack of oversight. The fraud itself isn't especially sophisticated, but it can run quietly for a surprisingly long time in a business that hasn't separated the duties of receiving and posting payments. If any part of this process sounds familiar, whether you're building out stronger controls proactively or you've noticed something in your receivables that doesn't quite add up, I'd encourage you not to wait for the scheme to collapse on its own. Contact us at Turning Numbers to talk through what you're seeing and how we can help.