96-Month Sentence in an
$89 million off-books payroll scheme
A sprawling construction-payroll case shows how shell companies, cash wages and false workers’ compensation records can create criminal exposure—and what employers should do to stay compliant.
A federal payroll-fraud prosecution involving approximately $89 million in construction checks ended with an eight-year prison sentence for Mario Lisandro Flores Moradel. The case offers employers a stark reminder: paying labor in cash does not eliminate payroll-tax, reporting or insurance obligations.
According to federal authorities, Flores and other participants used shell companies to convert subcontractor checks into cash between 2015 and 2022. Contractors could then pay workers outside ordinary payroll systems, while false records concealed wages from tax agencies and workers’ compensation insurers.
How the alleged pipeline worked
The network created dozens of shell businesses that offered check-cashing and cash-delivery services to construction subcontractors. Those entities cashed roughly $89 million in checks for a fee. The resulting cash was used to compensate workers without normal withholding or wage reporting, producing a reported tax loss of more than $38 million across the scheme.
The arrangement also reached workers’ compensation coverage. Authorities said participants understated payroll and worker counts to obtain lower premiums, then supplied contractors with certificates purporting to show coverage. Together, the payroll and insurance practices gave participating businesses an improper cost advantage over compliant employers.
| Component | Reported conduct | Compliance risk |
|---|---|---|
| Cash payroll | Subcontractor checks were converted to cash used to pay labor off the books. | Unpaid withholding and employment taxes; false wage reporting. |
| Shell entities | Multiple companies moved funds and obscured the true payroll activity. | Conspiracy and unlicensed money-transmission exposure. |
| Insurance records | Worker and payroll figures were understated and certificates supplied to contractors. | Insurance fraud, contract defaults and uncovered workplace claims. |
From operation to sentencing
- 2015–2022: The shell-company and cash-payroll network operates.
- May 22, 2025: Michael Mayorga and Francisco Alvarez plead guilty to conspiracy charges.
- October 9, 2025: Iris Villafranca and Osman Zapata plead guilty.
- March 23, 2026: Flores pleads guilty to conspiring to defraud the United States and operating an unlicensed money-transmitting business.
- April 14, 2026: Villafranca and Zapata receive prison sentences.
- June 24, 2026: Flores is sentenced to 96 months in federal prison.
Charges and penalties
Flores’s convictions involved conspiracy to defraud the United States under 18 U.S.C. §371 and operating an unlicensed money-transmitting business under 18 U.S.C. §1960. He admitted responsibility for approximately $9.4 million of the tax loss attributed to the broader operation.
The consequences extended across the group. Villafranca received 204 months in prison and substantial restitution and forfeiture orders; Zapata received 51 months and restitution; and Alvarez received probation and restitution. Each defendant’s judgment and financial obligations are individual, so headline totals should not be treated as interchangeable.
What employers should learn
Cash wages are not inherently unlawful, but employers still must classify workers correctly, calculate and deposit applicable employment taxes, issue accurate information returns and maintain supporting records. A third-party labor provider does not automatically shift those duties away from the business receiving the labor.
Employment authorization and workers’ compensation require their own controls. Employers should complete Form I-9 procedures, use E-Verify where required or elected, confirm coverage directly with authorized insurers, and reconcile insured payroll with tax and accounting records. A certificate alone should not substitute for verification.
A practical payroll-compliance checklist
- Reconcile every pay cycle. Match gross wages, withholding, bank activity, general-ledger entries and payroll returns.
- Vet labor vendors. Confirm legal names, tax IDs, licensing, insurance and who controls and pays each worker.
- Document worker classification. Analyze the actual working relationship rather than relying on a contract label.
- Verify work authorization. Complete and retain Forms I-9 and follow applicable E-Verify rules.
- Confirm insurance independently. Validate policies with the carrier and compare declared payroll with payroll records.
- Escalate unusual cash requests. Treat check-cashing, cash couriers, rotating shell vendors and split invoices as warning signs.
- Correct errors promptly. Ask qualified payroll and tax advisers about amended returns, deposits and available correction procedures before an examination begins.
The broader lesson is straightforward: transparent payroll systems protect workers, taxpayers and honest competitors. Businesses that discover irregularities should preserve records, stop questionable payments and obtain advice tailored to the facts rather than attempting an informal cleanup.
Frequently asked questions
Off-the-books payroll tax fraud FAQs
Plain-English answers about cash payroll, employer obligations, worker classification, enforcement risks, and practical safeguards.
1. What is off-the-books payroll?
Off-the-books payroll occurs when a business pays workers without properly recording wages, withholding payroll taxes, or reporting payments to federal and state agencies. It can involve cash, shell companies, false contractor classifications, or payments omitted from accounting records.
Paying someone in cash is not automatically illegal. The problem arises when the payment is intentionally hidden or not properly reported.
2. What happened in the $89 million off-the-books payroll case?
Federal prosecutors said the defendants operated shell companies that cashed approximately $89 million in construction subcontractor checks. Contractors then used the cash to pay workers without normal payroll reporting and tax withholding.
The scheme operated from approximately 2015 through 2022 and reportedly caused more than $38 million in tax losses.
3. How long was Mario Flores sentenced to prison?
Mario Flores was sentenced to 96 months, or eight years, in federal prison.
He pleaded guilty to conspiracy to defraud the United States and operating an unlicensed money-transmitting business. Prosecutors attributed approximately $9.4 million of the overall tax loss to his conduct.
4. Can an employer legally pay employees in cash?
Yes. An employer may legally pay employees in cash, but the wages must still be recorded and reported.
- Withhold applicable federal and state taxes
- Withhold Social Security and Medicare taxes
- Pay the employer’s share of payroll taxes
- Issue the appropriate tax forms
- Maintain payroll and employment records
- Report wages on payroll tax returns
Cash wages cannot be used to avoid payroll-tax obligations.
5. What payroll taxes must employers withhold?
Employers are generally responsible for withholding federal income tax, Social Security tax, and Medicare tax from employee wages.
- Federal unemployment tax
- State unemployment tax
- State income-tax withholding
- Local payroll taxes
- Additional Medicare tax withholding
- Workers’ compensation premiums
The specific requirements depend on the employee’s work location and the employer’s operations.
6. What are the penalties for paying employees off the books?
Consequences can include unpaid payroll taxes, interest, civil penalties, trust fund recovery penalties, criminal prosecution, restitution, forfeiture, and imprisonment.
- State tax assessments
- Workers’ compensation penalties
- Employment-law claims
- Immigration-related enforcement
- Loss of business licenses
- Contract termination
- Debarment from government projects
- Personal liability for responsible owners or officers
In serious cases, prosecutors may treat the conduct as tax fraud, conspiracy, money laundering, or operating an unlawful money-transmitting business.
7. Can a business owner be personally liable for unpaid payroll taxes?
Yes. Certain payroll taxes are trust fund taxes because an employer withholds them from employees and holds them for payment to the government.
The IRS may assess the Trust Fund Recovery Penalty against owners, officers, payroll managers, bookkeepers, or other responsible individuals who willfully fail to collect, account for, or pay those taxes.
Operating through an LLC or corporation does not always protect an individual from payroll-tax liability.
8. Can payroll companies be held liable for a client’s payroll fraud?
Potentially. Liability depends on the payroll company’s role, knowledge, conduct, contracts, and level of involvement.
- Knowingly processing false payroll information
- Helping conceal wages
- Creating misleading payroll reports
- Ignoring obvious discrepancies
- Directing funds through suspicious accounts
- Failing to remit entrusted payroll taxes
- Participating in worker misclassification
- Assisting with false tax filings
Payroll providers should use strong client onboarding, transaction monitoring, documentation, reconciliation, and escalation procedures.
9. What does this case mean for payroll service providers?
Payroll providers should expect increased scrutiny of businesses with unusually high cash withdrawals, inconsistent worker counts, multiple shell companies, unexplained subcontractor payments, or payroll figures that do not match operations.
- The client’s legal identity
- The source of payroll funds
- Worker classifications
- Tax identification numbers
- Payroll bank accounts
- Filing authorizations
- Wage and hour data
- Workers’ compensation information
- Unusual cash or check-cashing activity
A payroll provider should not treat itself as merely a software processor when available information suggests possible fraud.
10. What are common warning signs of payroll fraud?
- Large cash withdrawals near payroll dates
- Workers receiving cash without pay stubs
- Payroll expenses that do not match staffing levels
- Multiple companies using the same address or bank account
- Frequent checks payable to shell entities
- Large subcontractor payments with limited support
- Employee-like workers classified as contractors
- Missing Forms W-2 or 1099
- Late or missing payroll-tax deposits
- Workers’ compensation figures that differ from accounting records
A single warning sign does not prove fraud, but several combined indicators warrant investigation.
11. What is a shell company in a payroll fraud scheme?
A shell company is a legal entity that may have little or no legitimate business activity but is used to move money, hide ownership, disguise payments, or create false documentation.
In an off-the-books payroll scheme, a shell company may receive contractor checks, cash them, deduct a fee, and return the remaining money as cash for worker payments.
Shell companies may also be used to produce false invoices, insurance certificates, tax forms, or subcontractor records.
12. Is worker misclassification the same as payroll fraud?
Not always. Worker misclassification occurs when a business improperly treats an employee as an independent contractor.
Some misclassification results from misunderstanding the rules. It can become fraud when a business knowingly uses contractor status to avoid payroll taxes, workers’ compensation premiums, overtime requirements, or employment verification.
The IRS and other agencies examine the actual working relationship, not simply the label used in a contract.
13. How does the IRS determine whether someone is an employee or independent contractor?
The IRS generally evaluates the degree of control and independence in the working relationship.
- Who controls how the work is performed
- Who provides equipment and supplies
- Whether the worker can earn a profit or suffer a loss
- Whether the relationship is ongoing
- Whether the worker performs a key part of the business
- Whether employee-type benefits are provided
- Whether the worker is free to serve other clients
No single factor controls every case. The full relationship must be considered.
14. What is the correct payroll procedure for non-U.S. citizens?
Employers must first determine whether the individual is legally authorized to work in the United States.
- Complete Form I-9
- Review acceptable identity and work-authorization documents
- Reverify authorization when required
- Obtain a valid Social Security number when applicable
- Properly classify the worker
- Withhold and report payroll taxes
- Apply valid tax-treaty or nonresident rules
- Maintain payroll and immigration-compliance records
Citizenship does not determine whether wages must be reported. Authorized non-U.S. citizens may generally be placed on payroll like other employees, subject to applicable tax and immigration rules.
15. Can an employer place an undocumented worker on payroll?
An employer should not knowingly hire or continue employing a person who is not authorized to work in the United States.
However, wages paid for work performed may still create tax-reporting and payroll obligations. An employer cannot avoid payroll taxes by arguing that the worker lacked immigration status.
Employment authorization and payroll-tax compliance are separate legal issues; violating one does not eliminate obligations under the other.
16. What should an employer do if a worker’s Social Security number does not match?
The employer should not ignore the discrepancy or immediately assume fraud.
- Check employer records for typographical errors
- Ask the employee to verify the information
- Follow applicable Social Security Administration procedures
- Avoid discriminatory assumptions
- Document corrective steps
- Seek legal or payroll guidance when necessary
A Social Security mismatch by itself does not automatically prove that a person is unauthorized to work.
17. How was workers’ compensation insurance involved in the scheme?
The defendants allegedly provided false worker and payroll information to insurance companies to reduce workers’ compensation premiums.
They then supplied or ‘rented’ insurance documentation to subcontractors so those businesses could appear properly insured when bidding for work.
This exposed insurers, contractors, workers, and project owners to substantial financial and legal risk.
18. What happens when a company understates payroll to its workers’ compensation insurer?
Workers’ compensation premiums are often based partly on payroll, worker classifications, and the type of work performed.
- Additional premiums
- Audit adjustments
- Policy cancellation
- Denial of coverage
- Civil penalties
- Insurance-fraud charges
- Contractual claims
- Personal liability
- Criminal prosecution
If an injured worker was omitted from payroll records, disputes may also arise over insurance coverage and benefit eligibility.
19. What should a business do after discovering payroll mistakes?
The business should act quickly and avoid altering or destroying records.
- Reconcile payroll records to bank activity
- Determine affected workers and periods
- Calculate unpaid taxes
- File corrected payroll returns
- Issue corrected Forms W-2 or 1099
- Make delinquent tax deposits
- Correct workers’ compensation reporting
- Review worker classifications
- Consult a payroll-tax professional or attorney
- Establish stronger internal controls
Voluntary correction does not guarantee immunity from penalties, but early, documented action is generally better than allowing the problem to continue.
20. How can employers prevent off-the-books payroll fraud?
Employers should maintain a controlled, transparent payroll process.
- Use a dedicated payroll bank account
- Require written approval for payroll changes
- Reconcile payroll reports to bank transactions
- Reconcile payroll returns to the general ledger
- Restrict cash payroll
- Require pay stubs for all employees
- Verify Form I-9 completion
- Review worker classifications annually
- Confirm payroll-tax deposits directly
- Audit workers’ compensation classifications
- Investigate unusual subcontractor activity
- Separate payroll preparation, approval, and payment duties
- Retain payroll records and supporting documentation
- Use reputable payroll and accounting providers
Every worker, wage payment, payroll-tax deposit, and insurance declaration should be traceable to accurate supporting records.
Important: This article and FAQ section is general educational information, not legal, tax or immigration advice. Case descriptions summarize government allegations, plea information and reported sentencing outcomes. Consult qualified counsel about specific facts and confirm current requirements with the relevant agencies.