How to block a charge depends on whether the transaction has already posted
If a charge has not yet posted to your account, you can contact your card issuer and ask them to block it before it settles. If the charge has already posted, you cannot block it retroactively — instead, you file a dispute to have it reversed. The method you use depends on the timing and the reason: unauthorized use, a merchant error, or a service you cancelled but were still charged for.
Most card issuers let you dispute charges through their mobile app, website, or by calling the customer service number on the back of your card. The process is faster if you act within 60 days of the charge appearing on your statement, though you have up to 120 days in some cases.
Key Takeaways
- Contact your card issuer immediately if you see an unauthorized charge — most issuers will freeze the transaction before it settles if you call within hours.
- For charges that have already posted, file a dispute through your card issuer's app or website, or call the number on the back of your card.
- You must dispute a charge within 60 days of the statement date it appears on to receive federal protection under the Fair Credit Billing Act.
- Your card issuer will typically issue a temporary credit while they investigate, and you are not responsible for paying the disputed amount during that time.
- Keep records of all communication with the merchant and your card issuer, including confirmation numbers and dates.
Stopping a charge before it posts to your account
If you notice a pending charge on your account that you did not authorize or that you want to cancel, call your card issuer immediately. Pending charges have not yet settled, meaning the money has not left your account. Your issuer can sometimes contact the merchant and ask them to cancel the transaction before it clears.
The window to stop a pending charge is narrow — usually 24 to 48 hours from when it first appears. After that, the charge typically posts and becomes permanent on your statement. If you catch it in time, the issuer will either reverse it or confirm that the merchant has agreed to cancel it. Ask for a confirmation number for your records.
Filing a dispute for a charge that has already posted
Once a charge has posted to your statement, you cannot prevent it from appearing — you can only dispute it and request a reversal. Log into your card issuer's website or mobile app and look for a "Disputes" or "Transactions" section. Most issuers let you select the charge and choose a reason: unauthorized, duplicate, merchant error, or service not rendered.
When you file the dispute, your issuer will typically issue a temporary credit to your account within one to three business days while they investigate. You are not responsible for paying the disputed amount during this time. The investigation itself usually takes 30 to 60 days. Keep the confirmation number the issuer gives you and any documentation you have — receipts, emails, cancellation confirmations, or screenshots.
Disputing unauthorized charges
If someone used your card number without permission, report it to your card issuer as soon as you notice it. Under federal law, your liability for unauthorized charges is capped at $50, and most issuers waive even that if you report the fraud promptly. The issuer will cancel your current card and issue a replacement.
When you file the dispute, state clearly that you did not authorize the charge. The issuer will ask you to confirm that you did not make the purchase and may ask where you were when the charge occurred. If the charge is part of a pattern of fraud, the issuer may flag your account for additional monitoring or ask you to verify future transactions.
Disputing duplicate charges and merchant errors
Duplicate charges happen when a merchant processes the same transaction twice by mistake, usually within hours of the original charge. If you see two identical charges on the same day, file a dispute immediately and note that it is a duplicate. Include the date and amount, and the issuer will contact the merchant to confirm.
Merchant errors also include charges for the wrong amount — for example, you were charged $150 instead of $15. When you dispute, explain what the correct amount should have been and provide any receipt or confirmation email showing the agreed price. The merchant may correct it directly, or the issuer may reverse the charge and ask the merchant to resubmit the correct amount.
Disputing charges for services you cancelled
If you cancelled a subscription, membership, or service but were still charged, gather your cancellation confirmation before filing the dispute. Most merchants send a cancellation email — save this and have it ready when you contact your issuer. Include the date you cancelled and the date the unwanted charge appeared.
Some issuers will reverse the charge immediately if you provide proof of cancellation. Others will contact the merchant to verify that you cancelled. If the merchant claims you did not cancel, you may need to provide additional evidence — a screenshot of your account settings showing the cancellation, or a phone number and date you called to cancel. Keep a record of every cancellation you make, including confirmation numbers.
What happens after you file a dispute
Your card issuer will send you a written notice within three business days confirming that they received your dispute. This notice will include a reference number, the amount in question, and the date by which they will complete their investigation. During the investigation, the issuer contacts the merchant and asks them to provide proof that the charge was authorized and correct.
The merchant has a set time — usually 10 to 30 days — to respond. If they do not respond or cannot provide proof, the issuer will reverse the charge permanently and the temporary credit becomes final. If the merchant provides proof that the charge was valid, the issuer will notify you and the temporary credit will be removed from your account. You can then dispute again if you believe the merchant's proof is incorrect, though this second dispute is less likely to succeed.
Preventing unwanted charges in the future
Review your credit card statement every month, even if you receive it electronically. Set up alerts through your card issuer's app for charges over a certain amount — many issuers let you set this threshold. This way you will be notified immediately if a large charge posts, giving you time to dispute it quickly.
For subscriptions and recurring charges, keep a list of which merchants charge your card and when. Check this list against your statement each month. If a merchant you do not recognize appears, dispute it right away. For services you use occasionally, consider using a virtual card number — many issuers offer this feature, which generates a temporary card number for a single merchant or a set spending limit, protecting your main card number from being stored or reused.
Frequently Asked Questions
What is the deadline to dispute a charge?
You have 60 days from the date the charge appears on your statement to file a dispute and receive federal protection under the Fair Credit Billing Act. Some issuers allow disputes up to 120 days, but waiting longer makes it harder to gather evidence and increases the chance the merchant will not respond. File as soon as you notice the problem.
Do I have to pay a disputed charge while the investigation is happening?
No. Once you file a dispute, you are not required to pay the disputed amount. Your issuer will typically issue a temporary credit within one to three business days, and you can use your card normally for other purchases. If the dispute is resolved in the merchant's favor, the temporary credit is removed and you will owe the amount.
What if the merchant says I authorized the charge?
If you did not authorize it, tell your issuer that clearly. The burden is on the merchant to prove you authorized it — they must provide a signed receipt, an email confirmation you sent, or other evidence that you agreed to the charge. If they cannot provide this proof, your issuer will reverse the charge. If they do provide proof and you still believe it is wrong, you can file a second dispute with additional evidence.
Can I dispute a charge if I am unhappy with what I bought?
No. Disputes are for unauthorized charges, fraud, merchant errors, and services not rendered — not for buyer's remorse or items that did not meet your expectations. If you received something defective or not as described, contact the merchant first to request a refund or return. If they refuse, you may then have grounds for a dispute based on "merchandise not as described."
How long does a dispute investigation take?
Most investigations take 30 to 60 days. Your issuer will send you a written update within this timeframe. If the merchant does not respond to the issuer's request for proof within 10 to 30 days, the issuer will typically rule in your favor and the temporary credit becomes permanent. If the merchant responds with proof, the issuer will notify you of the outcome.