MCC Codes
5521

Automobile and Truck Dealers - Used Only

A guide for underwriters at ISOs and Acquirers onboarding MCC 5521 used vehicle dealer merchants, covering risk assessment, fraud signals, and the underwriting questions that matter.
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Table of Contents
Overview
Business Types
Payment Processing Info
Key Risks & Concerns
Common Fraud Signals
Example Scenarios
Common Questions
Ongoing Monitoring
Useful Sources

Underwriting Cheat Sheet

If you're underwriting a used vehicle dealer, MCC 5521 concentrates risk around large average tickets, deposit and down payment refunds, and curbstoning or unlicensed flipping behind a thin storefront. Title problems, odometer disputes, and as-is condition fights drive chargebacks well after the sale clears. Here's what to look for.

Key Information

This guide covers used-only auto and truck dealers, where high ticket sizes, deposit handling, and post-sale condition and title disputes create concentrated fraud and chargeback exposure.

Typical Business Types

Independent Used Car Lots

#1
Standalone dealers selling consumer vehicles outside any franchise.

Buy Here Pay Here Dealers

#2
Lots that finance their own buyers and collect installment payments.

Used Commercial Truck Dealers

#3
Sellers of used box trucks, tractors, and work vehicles to businesses.

Payment Processing Information

Transaction Types

1

Vehicle Sale Card Payment

Buyer pays full price or a portion of it by card at delivery.
2

Down Payment or Deposit

Partial card payment to hold a vehicle before financing completes.
3

Reservation Hold

Card charge to take a vehicle off the market pending inspection.
4

Documentation and Title Fees

Card charges for doc prep, registration, and title transfer.
5

In-House Installment Payment

Recurring card payments on a buy here pay here loan.

Common Payment Methods

Credit and Debit Cards - Often capped by the dealer due to interchange on large tickets
ACH and Bank Transfer - Common for the balance after a card deposit
Cash and Cashier's Check - Still heavily used for full vehicle purchases
Financing Disbursement - Lender pays the dealer directly outside the card rails
Recurring Card Billing - Buy here pay here installment collection on file

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Key Risks & Concerns

Fraud Risks

  • Curbstoning - Unlicensed sellers moving many cars through one merchant account
  • Stolen Card Vehicle Purchase - High-value fraud using compromised card data
  • Deposit Refund Abuse - Buyers disputing non-refundable holds after walking away
  • Title Washing - Hidden salvage or branded titles surfacing in later disputes
  • Odometer Rollback Claims - Buyers alleging mileage fraud and reversing payment

Regulatory Challenges

  • FTC Used Car Rule - Buyers Guide window sticker disclosure requirements
  • Odometer Disclosure Act - Federal mileage statement at transfer of title
  • State Dealer Licensing - Bonding and lot licensing for used vehicle sales
  • Truth in Lending Act - Disclosure on buy here pay here installment financing
  • State Lemon and As-Is Rules - Condition warranty and disclaimer requirements

Common Fraud Signals

Card Volume Far Below Sales Count

Most value settling off-card while card tickets stay small.

Spike in Deposit Refund Disputes

Repeated chargebacks tied to holds and cancelled sales.

Many Vehicles Per Month, One Account

Volume consistent with curbstoning rather than a fixed lot.

Example Scenarios and Red Flags

No Physical Lot Verified

Address resolves to a home or vacant parcel, not a dealership.

Missing Dealer License or Bond

Licensing cannot be confirmed with the state DMV.

High-Value First-Time Cardholder

Large vehicle purchase on a card with no prior history.

As-Is Sale With Warranty Disputes

Chargebacks claiming defects on explicitly as-is vehicles.

Title Delays After Funding

Buyers reporting they never received clean title after payment.

Common Underwriting Questions

UW Tips Business

  1. Verify the state dealer license, surety bond, and lot address
  2. Confirm a physical, operational sales lot with inventory
  3. Check the dealer bond amount against expected monthly volume

UW Tips Financial

  1. Understand high average tickets and low monthly transaction counts
  2. Review seasonal demand and inventory turnover patterns
  3. Assess the split between card, cash, and lender-funded deals

UW Tips Risk

  1. Examine deposit and down payment refund policies and disclosures
  2. Evaluate title transfer timing and Buyers Guide compliance
  3. Review chargeback history for condition and mileage disputes

UW Questions Business

  1. Are you a licensed and bonded used vehicle dealer in your state?
  2. Do you operate a physical lot and how many cars do you stock?
  3. Do you offer in-house buy here pay here financing?

UW Questions Payments

  1. What share of a sale is taken by card versus financing or cash?
  2. Do you cap card payment amounts and why?
  3. How are deposits and reservation holds processed and disclosed?

UW Questions Fraud

  1. How do you verify identity on high-value card purchases?
  2. What stops the same buyer from disputing a non-refundable deposit?
  3. How do you screen for stolen card use on large tickets?

UW Questions Compliance

  1. Do you provide the FTC Buyers Guide on every used vehicle?
  2. How do you handle odometer disclosure at transfer of title?
  3. Are your installment contracts TILA compliant?

UW Questions Chargebacks

  1. What is your chargeback ratio and what reasons dominate?
  2. How do you document vehicle condition at the point of sale?
  3. How fast do you deliver clean title after a deal funds?

UW Questions Infrastructure

  1. Is your dealer management system integrated with your processor?
  2. How do you reconcile lender disbursements against card deposits?
  3. Do you keep signed as-is and condition disclosures on file?

Ongoing Monitoring

Transaction Monitoring

  • Watch deposit refund and cancellation dispute patterns
  • Track card volume against reported number of vehicle sales
  • Flag repeated high-value purchases on new cardholders

Compliance Checks

  • Keep dealer license and surety bond current
  • Maintain Buyers Guide and odometer disclosure records
  • Stay current on state as-is and lemon law requirements

Security Updates

  • Use EMV and identity verification on large in-person tickets
  • Apply encryption and tokenization for stored installment cards
  • Require additional verification on first-time high-value buyers

Risk Assessment

  • Adjust monitoring during tax refund buying season
  • Address title delivery delays before they become disputes
  • Evaluate curbstoning indicators on rising vehicle counts

Merchant Communication

Help the dealer set clear, written deposit and as-is policies that hold up in disputes. Share documentation practices for condition, mileage, and title transfer that reduce chargebacks. Support cash flow planning across seasonal demand swings.

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Useful Sources

Visa Merchant Data Standards Manual

PCI DSS Quick Reference

FTC Used Car Rule and Buyers Guide

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