You can block a merchant from charging your credit card, and there are three tools that actually work: cancel the billing arrangement with the merchant, ask your card issuer to block that specific merchant, or dispute the charges in writing under the Fair Credit Billing Act. The order matters more than most people realize. A bank block stops the charge from posting, but it does not cancel your contract with the merchant, and an unpaid balance can be sent to collections even after your bank has done its job.
Cancel With the Merchant First
Before you call your bank, contact the merchant directly and cancel the subscription or recurring billing arrangement. The Office of the Comptroller of the Currency advises consumers to cancel preauthorized merchant agreements directly with the merchant rather than relying on the bank to stop charges.1HelpWithMyBank.gov. Why Does the Bank Keep Accepting Charges on My Closed Account? Your card agreement likely requires the same thing.
Get the cancellation in writing. Save confirmation emails, screenshot any web page that confirms the cancellation, and note the date, time, and name of anyone you spoke with. If the merchant makes cancellation unreasonably difficult through long phone trees, transfers between representatives, or hidden cancellation pages, that behavior may itself violate federal consumer protection standards. The Consumer Financial Protection Bureau has warned that making cancellation unreasonably difficult can be an unfair or deceptive practice.2Consumer Financial Protection Bureau. CFPB Issues Guidance to Root Out Tactics Which Charge People Fees for Subscriptions They Dont Want
Document every hoop the merchant makes you jump through. That paper trail is what makes a later billing dispute stick.
Ask Your Card Issuer to Block the Merchant
If the merchant keeps charging you after you cancelled, or you cannot reach them, ask your issuer to block future charges from that specific vendor. Most major issuers offer this in the online banking dashboard or mobile app. Look inside the transaction details for options labeled “block merchant,” “stop payment,” or “manage recurring charges.” If the digital tools do not include the feature, call the number on the back of your card and ask for the block verbally.
Have these details ready before you call:
- The merchant name exactly as it appears on your statement, which often differs from the brand name you recognize.
- The date and dollar amount of the most recent charge.
- Any transaction reference numbers from your statement or app.
- Proof that you already cancelled with the merchant, if you have it.
The representative will apply a merchant-level block that tells the authorization system to decline future charge attempts from that vendor. You should receive a confirmation number. Save it. The block generally takes effect within a few business days, after which the merchant’s charges are declined at the network level.
One limit is worth knowing. This is an internal bank tool, not a federally guaranteed right for credit cards. Debit cards work differently: federal law explicitly requires your bank to honor stop-payment orders for preauthorized transfers with three business days’ notice.3Consumer Financial Protection Bureau. Regulation E 1005.10 Preauthorized Transfers Credit cards have no equivalent statute. Most issuers will place the block anyway, but the obligation comes from your card agreement.
Dispute Posted Charges Under the Fair Credit Billing Act
A merchant block prevents future charges. It does nothing about charges already on your statement. For those, the Fair Credit Billing Act gives you a separate and stronger tool: you can dispute charges as billing errors when the merchant billed the wrong amount, billed for something you did not receive, or kept charging after you cancelled.4Office of the Law Revision Counsel. 15 USC 1666 Correction of Billing Errors
Put It in Writing
The dispute must be in writing to trigger the full FCBA protections. A phone call may start an informal review, but it does not lock in your legal rights under the statute. Send the letter to the issuer’s designated billing inquiries address, not the general mailing or payment address. That address is typically printed on your monthly statement.4Office of the Law Revision Counsel. 15 USC 1666 Correction of Billing Errors
Your letter needs your name, address, and account number; a statement that you believe the bill contains an error and the dollar amount; and the reasons you believe it is wrong. Send it by certified mail with a return receipt.
You Have 60 Days
You must send the notice within 60 days from the date the first statement containing the error was mailed to you. Miss the window and the issuer has no obligation to investigate or credit your account. For recurring charges, each new charge on a new statement restarts the 60-day clock for that specific charge, but earlier charges may already be too old to challenge.5Federal Trade Commission. Using Credit Cards and Disputing Charges
What the Issuer Has to Do
Once your written notice arrives, the issuer must acknowledge it within 30 days and resolve the dispute within two complete billing cycles, no more than 90 days total.4Office of the Law Revision Counsel. 15 USC 1666 Correction of Billing Errors During that window you can withhold payment on the disputed amount and related finance charges. You still owe the undisputed portion of your bill.
While the investigation is open, the issuer cannot report the disputed amount as delinquent, cannot take legal action to collect it, cannot close or restrict your account solely because you filed the dispute, and cannot threaten your credit rating for exercising your rights.5Federal Trade Commission. Using Credit Cards and Disputing Charges They can apply the disputed amount against your credit limit, which may reduce your available balance while the review runs.
If the issuer finds a billing error, they must credit your account and remove the associated finance charges. If they find no error, they must explain the finding in writing.
Why a New Card Number Often Won’t Stop the Charges
Requesting a replacement card feels like the clean solution. It usually isn’t. All four major card networks — Visa, Mastercard, American Express, and Discover — run automatic account updater services that push your new card details to merchants who had recurring billing set up on your old number.
The service exists to keep legitimate subscriptions running through expirations and reissues. It also means a merchant you are trying to escape can receive your new number automatically, without you handing it over. From the network’s perspective, the authorization you gave attaches to your account, not to a specific 16-digit number, so the recurring charge is still valid.6Visa Developer. Visa Account Updater (VAU) FAQs
You can opt out. Contact your issuer and specifically ask them to submit an opt-out for your account through the network’s updater service — Visa Account Updater, Mastercard Automatic Billing Updater, or the equivalent. On Visa’s system, the issuer can submit a “Cardholder Opt-Out Advice” that stays in effect indefinitely until you choose to opt back in.6Visa Developer. Visa Account Updater (VAU) FAQs Not every representative will recognize the request; you may need to escalate or use the exact terminology. Once the opt-out is in place and you receive a new card number, the old merchant tokens go dead.
The trade-off is that every legitimate recurring charge will also stop working after your next card replacement, and you will need to update each one by hand. For someone dealing with a stubborn merchant, that is usually worth it.
Unauthorized Charges Follow Different Rules
Everything above assumes you originally authorized the merchant and now want the charges to stop. If someone used your card without your permission at all — a stolen number, a fraudulent transaction, a merchant you never did business with — stronger rules apply. Under Regulation Z, your maximum liability for unauthorized credit card charges is $50, and most issuers waive even that.7eCFR. 12 CFR 1026.12 Special Credit Card Provisions
The line matters. A subscription you signed up for and forgot about is not unauthorized use. A merchant who keeps charging after you cancelled is a billing dispute. A charge from a company you have never heard of is unauthorized, and your issuer should remove it promptly once you report it.
Blocking a Charge Is Not the Same as Canceling the Contract
This is where the trap closes on people. Telling your bank to block a merchant or replacing your card number does nothing to your contractual obligation to the merchant. If you signed a 12-month agreement and block the charges in month four, the merchant’s billing system sees unpaid invoices, not a cancellation. From their side, you still owe the remaining balance.
Merchants who cannot collect through your card have options. They can send the unpaid balance to a third-party collection agency, which may then report the debt to credit bureaus. They can pursue the balance in small claims court. A successful chargeback shifts the short-term financial loss to the merchant, but it does not stop the merchant from seeking payment through other channels if they believe the charge was legitimate.
The right sequence is cancellation first, confirmation in writing, and only then a bank block or FCBA dispute as backup if charges continue. When you have properly cancelled and the merchant charges you anyway, you are on solid ground. When you skip cancellation and just block the card, you are creating a collections risk that can surface on your credit report months later. Your bank can stop a charge from going through. It cannot void a contract you never actually terminated.