A 4355 credit card charge is almost never a company called “4355.” The number is a fragment of a truncated billing descriptor — usually a store or location number, a terminal ID, or an internal merchant reference that got squeezed into the 20-to-25-character line your statement allows. Before you treat it as fraud, you need to identify what the full descriptor is actually pointing at.
Why “4355” Shows Up With No Clear Merchant
Your statement pulls each transaction description from data the merchant’s payment system sends to your card network and bank. That data often doesn’t match the name on the storefront or website. A business may process payments under a parent company’s legal name, a “doing business as” name, or a third-party processor. Numbers inside the descriptor, like 4355, typically represent a store number, a terminal, or an internal reference that only the merchant’s own accounting system would recognize.
What 4355 Is Not
4355 is not a Merchant Category Code. Standard MCC lists jump from 4225 (public warehousing) to 4411 (cruise and steamship lines) and skip 4355 entirely, so it is not an industry classification.
Separately, credit card account numbers beginning with 4355 have been associated with U.S. Bank Premiere Line Visa cards. If you hold a U.S. Bank Visa, check whether the 4355 you are seeing is actually the opening digits of your own card number appearing in a transaction record rather than a merchant name.
How to Figure Out Who Charged You
Most unrecognized charges turn out to be legitimate purchases that just look different on paper. Run through these checks first.
- Match the date and dollar amount against email receipts, order confirmations, and your purchase history. Subscription renewals and annual auto-charges are easy to forget.
- Copy the entire descriptor, not just “4355,” and search it online in quotation marks. This often surfaces the parent company or payment processor.
- Ask anyone else on the account. An authorized user’s purchase posts under your account and can look unfamiliar.
- Watch for a tiny “test” charge of a dollar or two. Fraudsters sometimes run small charges to confirm a stolen number is active before attempting bigger ones.
- If the descriptor includes a phone number or partial URL, call or visit it. Many descriptors embed a customer service number for exactly this reason.
When to Treat It as Fraud or a Billing Error
If none of those checks explain the charge, or you are confident you did not authorize it, you have strong federal protections. When you contact your issuer, be specific about which kind of problem you are reporting: a billing error (wrong amount, duplicate charge, goods not received) or an unauthorized transaction. Both are covered by federal law, but the investigation differs slightly.
How to Dispute the Charge With Your Issuer
Call the number on the back of your card or open your issuer’s app or website. Most major banks let you flag a posted transaction and start a dispute digitally.
Then follow up in writing. Federal law requires that you send a written dispute notice to the address your card issuer designates for “billing inquiries” — not the payment address — within 60 days of the statement date on which the charge first appeared. Include your name, account number, the disputed amount, and an explanation of why you believe it is an error. Send copies of supporting documents, never originals. The FTC recommends certified mail with a return receipt so you have proof of delivery.
Your Rights While the Dispute Is Open
Under the Fair Credit Billing Act, your issuer must acknowledge your dispute in writing within 30 days and resolve it within two billing cycles, up to a maximum of 90 days. While the investigation is open, you may withhold payment on the disputed amount and any related finance charges, but you must keep paying the undisputed portion of your bill. Your issuer cannot report the disputed amount as delinquent, close or restrict your account, or take collection action against you during this period.
If the issuer agrees with you, it must remove the charge and any associated fees. If it decides the charge is valid, it must explain why in writing and give you at least 10 days (or your full grace period, whichever is longer) to pay before reporting the amount as past due. You can keep disputing the finding in writing, and the issuer must then mark the account as “in dispute” with credit bureaus.
How Much You Could Owe for an Unauthorized Charge
Your exposure depends on whether the charge hit a credit card or a debit card. The protections are not the same.
Credit Cards
The Fair Credit Billing Act caps your liability for unauthorized credit card charges at $50. If only your card number was stolen and the physical card was not lost, you owe nothing for unauthorized use. Many issuers go further with zero-liability policies that waive even the $50. If the unauthorized charge was made by phone or online, the $50 cap does not apply and you owe nothing.
Debit Cards
Debit card protections under the Electronic Fund Transfer Act are time-sensitive. Report the unauthorized charge within two business days of learning about it and your liability is capped at $50. Report it after two days but within 60 days of your statement and the cap rises to $500. Wait longer than 60 days and you could be on the hook for the full amount of unauthorized transfers that occurred after that window, on the reasoning that the bank would have stopped them had you spoken up sooner.
If Your Issuer Won’t Resolve It
When a bank fails to investigate properly or you disagree with its conclusion, you can escalate. The Consumer Financial Protection Bureau accepts complaints online at consumerfinance.gov/complaint or by phone at (855) 411-2372. You can also file a complaint with your state attorney general’s office. If you believe the charge is tied to identity theft, report it at IdentityTheft.gov to build a formal recovery plan.