A FleetCor lockbox payment is a check you mail to a bank-run P.O. Box that deposits the funds and forwards your payment data to Corpay (FleetCor’s current name) for posting to your fuel card or fleet account. The correct lockbox address is printed on your most recent invoice or statement, and the simplest way to make sure your check reaches the right place is to mail it in the pre-printed envelope that came with that statement, with the remittance coupon enclosed.
The lockbox is not Corpay’s mailroom. It’s a third-party bank facility that opens your envelope, deposits the check the same day it arrives, and reads the remittance coupon to match the payment to your account number automatically. For fleet accounts running heavy weekly fuel charges, that same-day crediting is often what keeps a payment on the right side of the due date.
What Makes a Check Conforming
Corpay’s client agreements split check payments into “conforming” and “non-conforming,” and the label decides how fast your money posts. A conforming check meets four requirements:
- One check per account per statement, with no check skirt (the perforated border on some check stock) attached.
- The remittance coupon detached from the bottom of your statement and included in the envelope.
- Your account number shown clearly on the coupon or the check’s memo line.
- The check mailed in the pre-printed envelope that came with your statement.
These rules exist because the bank’s equipment reads the coupon and posts payments automatically. A bundled check covering multiple accounts, or a check with no coupon, forces manual research. That is what pushes a payment into the slower non-conforming track.
Where to Mail the Payment
Use the lockbox address exactly as it appears on your current invoice or statement. It is not the same as Corpay’s customer service correspondence address, and it can differ depending on whether you’re sending regular mail or an overnight courier. Some Corpay agreements charge a fee for checks sent to the wrong address, so it’s worth checking the statement each time rather than relying on memory.
The customer service address in recent Corpay agreements is Attention: Customer Service, Corpay One, P.O. Box 1239, Covington, LA 70434. That address is for written correspondence and disputes. Don’t send payment checks there unless your statement specifically tells you to.
When a Payment Posts
A conforming check received by 11:59 p.m. Eastern Time on a business day (Monday through Friday, excluding banking holidays) is credited to your account as of the date received.1Fuelman. Corpay Technologies Operating Company, LLC Fuelman Fleet Card Client Agreement Anything arriving after that cut-off, on a weekend, or on a banking holiday posts the next business day.
A non-conforming payment is credited as of the next business day, or the first day Corpay can identify which account the check belongs to, but no later than two business days after the bank receives it.1Fuelman. Corpay Technologies Operating Company, LLC Fuelman Fleet Card Client Agreement That extra window can push a tight payment past its due date, which is why the four conforming requirements matter.
What Happens If You’re Late
Corpay fuel card accounts aren’t revolving credit. The full statement balance is due by the due date printed on the statement, and a late fee triggers if payment isn’t received by then.
The fee itself depends on your agreement. A recent Fuelman fleet card agreement sets the late fee at the greater of $99 or 17.99% of the “New Balance,” a figure that includes overdue amounts plus any new charges posted through the end of the next billing cycle.1Fuelman. Corpay Technologies Operating Company, LLC Fuelman Fleet Card Client Agreement Older agreements used smaller figures such as $75 or 12.25%, so the rate that applies to you is the one written into your specific agreement.2Fuelman. Summary of Rates, Fees, and Other Costs – Fuelman
Because unpaid charges and fees roll into the principal for the next billing period, finance charges then accrue on that larger balance. A single missed due date can grow quickly.
Paying Online or by Phone Instead
You don’t have to mail a check at all. Corpay’s online account portal accepts payments electronically, and phone payments are also available. Under the 2024 Fuelman agreement, both client-initiated online payments and pay-by-phone payments post on the same schedule as conforming checks: same-day credit if received by 11:59 p.m. Eastern on a business day.1Fuelman. Corpay Technologies Operating Company, LLC Fuelman Fleet Card Client Agreement
Some older agreements charged convenience fees for phone or non-standard payment methods. If your agreement predates the FTC injunction described below, review it or call customer service to confirm what fees still apply. Paying through the online portal is generally the cleanest route: same-day credit, a digital receipt, and no conforming-check requirements to worry about.
If a Payment Is Missing or Posted Wrong
Check the online portal first. It’s the quickest way to see whether a payment has posted and which invoice it was applied to. If something looks off, don’t sit on it. Late fees accrue automatically once a due date passes, and getting a dispute on the record early strengthens your case for reversing any fee that shouldn’t have been charged.
Notify Corpay in writing. Your notice should include your name, the full account number, the statement date, the dollar amount at issue, and a clear description of the problem. Attach whatever supporting documentation you have: a cleared check image from your bank, a mail tracking number, or a screenshot of your online payment confirmation.
Written notices go to the customer service address on your statement or in your agreement. In recent Corpay agreements, that address is Attention: Customer Service, Corpay One, P.O. Box 1239, Covington, LA 70434. Your agreement may set a deadline for raising disputes, so check that clause and act inside the window.
Keep copies of everything you send, including the check itself. Photograph or scan checks before mailing, use a trackable method for large amounts, and save online payment confirmations. Documentation is what turns a missing payment into a quick fix rather than a drawn-out back-and-forth while late fees pile up.
Fee Protections Under the FTC Injunction
Anyone paying Corpay should know about the Federal Trade Commission’s enforcement action against the company. The FTC sued FleetCor (now Corpay), alleging it charged customers unauthorized add-on fees and late fees, including late fees on accounts that had paid on time.3United States Court of Appeals for the Eleventh Circuit. Federal Trade Commission v. Corpay, Inc.
A federal court issued a permanent injunction in June 2023, and the Eleventh Circuit upheld it in January 2026.3United States Court of Appeals for the Eleventh Circuit. Federal Trade Commission v. Corpay, Inc. Under the injunction, Corpay must obtain your “Express Informed Consent” before charging any fee. That means an affirmative act of agreement from you, after a clear disclosure of what the fee is for, the exact amount, whether it recurs, and the circumstances that trigger it.4Federal Trade Commission. Brief of the Federal Trade Commission – FTC v. FleetCor Technologies, Inc. Burying the fee description behind a hyperlink or lumping several charges into one blanket consent is prohibited.
Practically, this gives you leverage. If a fee appears on your statement that you don’t recognize or never agreed to, document it, check whether you received the required disclosure before it was charged, and raise the issue with customer service in writing. Complaints about ongoing violations can be filed with the FTC at ftc.gov/complaint. Reviewing every statement line by line, especially the fees section, is the habit that catches problems while they’re still easy to unwind.