How to Dispute an Unauthorized Transaction on Your Credit Card (2026 Guide)
Spotting an unauthorized charge on your credit card statement requires immediate action. The Fair Credit Billing Act (FCBA) and card network rules let you dispute it to get your money back, provided you have valid reasons like fraud or processing errors, and you act within strict time limits--typically 60 days from the statement date for FCBA protections. American Express and Discover often allow 120 days from the transaction date.
The process begins by contacting the merchant for a resolution. If that doesn't work, turn to your card issuer through their app, online portal, phone, or mail, supplying details of the error. Include evidence such as transaction records or police reports for fraud cases. Issuers investigate and often provisionally credit your account while they review. Success depends on quick action and qualifying under categories like authorization errors or fulfillment issues, rather than simple dissatisfaction with a purchase.
This guide covers deadlines, valid reasons, step-by-step instructions, network differences, and FAQs, based on FCBA protections and standard card practices.
Act Fast: Time Limits to File Your Dispute
Missing the deadline can result in claim denials, so knowing the time limits is essential for protecting your rights. FCBA protections require filing within 60 days of the statement date when the unauthorized transaction first appears, Chargebacks911 notes in its 2026 guidance, echoed by The Points Guy 2024 analysis.
American Express and Discover generally provide a 120-day window from the transaction date. These limits can vary by network rules, so review your card's terms or contact your issuer. Mailing a formal dispute letter within 60 days creates a useful paper trail if online methods fail.
Staying within these windows preserves your right to recovery. Delays beyond them undermine your case, even in obvious fraud. The timeframes specifically cover unauthorized transactions and billing errors that qualify under FCBA.
Valid Reasons to Dispute vs. What You Can't Challenge
Not every unwanted charge qualifies for a dispute--sticking to legitimate categories improves your chances and saves time. You can challenge transactions for core reasons: fraud, authorization errors (such as duplicate charges without consent), processing errors (incorrect amounts or dates), or fulfillment errors (items not delivered as promised), per Chargebacks911 2026 categories.
The FCBA and card rules bar disputes over product quality dissatisfaction, service issues, or purchases by an authorized user on your account, as The Points Guy outlines citing FCBA guidelines. Match your situation to these criteria: if it's clearly unauthorized or a billing mistake, move forward. Gather supporting evidence like emails, receipts, or fraud affidavits to build a stronger case.
Focusing on evidence-based reasons avoids futile efforts on ineligible claims. Only errors linked to unauthorized access or merchant mistakes prompt issuer investigations, setting them apart from buyer’s remorse, which laws explicitly exclude.
Step-by-Step Process to Initiate a Dispute
Follow this structured workflow to file effectively, beginning with the merchant before escalating to your issuer.
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Contact the merchant first: Check your statement for charge details, then contact them directly--by phone, email, or their dispute portal--to request a refund or reversal. Document all communications, including dates and responses. Issuers often expect this good-faith step, as The Points Guy 2024 guidance advises.
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Prepare your dispute details: Note the transaction date, amount, merchant name, and reason (e.g., fraud). For fraud, file a police report if possible. Collect statements, receipts, or screenshots as proof.
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Submit to your issuer within the deadline: Use their app, online portal, or phone line--call customer service if no digital option exists. Or mail a formal dispute letter detailing the error, postmarked within 60 days of the statement date. Include your account info and supporting documents.
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Monitor the process: Issuers typically provisionally credit your account during investigation (up to 45 days under FCBA for billing errors). Respond quickly to requests for more information.
For American Express, they may send an inquiry to the merchant, giving 20 days for a response before deciding. Track status through your account portal.
This sequence, aligned with Points Guy and Chargebacks911 processes, sets you up for the best outcome. Each step creates a documented trail, from merchant attempts to issuer escalation, meeting FCBA requirements for timely, evidenced claims.
Choosing Your Dispute Path by Card Network
Processes are similar across networks but vary in timelines and details. Visa and Mastercard adhere to the 60-day FCBA window from the statement date. American Express and Discover extend to 120 days from the transaction date, with Amex including a preliminary merchant inquiry step.
Use this table to select your path:
| Network | Dispute Window | Key Process Notes |
|---|---|---|
| Visa | 60 days from statement date | Online/app/phone/mail; FCBA protections |
| Mastercard | 60 days from statement date | Online/app/phone/mail; merchant contact first |
| American Express | 120 days from transaction date | Includes 20-day merchant inquiry if unclear |
| Discover | 120 days from transaction date | Online/phone/mail; provisional credits common |
Verify exact details with your issuer, as terms can evolve. Start with merchant resolution for all networks, then escalate via the issuer's preferred method. This tailored approach maximizes your window and follows specific procedures, like Amex's inquiry for unclear cases.
FAQ
How soon must I dispute an unauthorized transaction?
For FCBA protections, within 60 days of the statement date; Amex and Discover allow up to 120 days from the transaction date.
What counts as a legitimate reason for a chargeback?
Fraud, authorization errors, processing errors (wrong amount/date), or fulfillment errors (non-delivery).
Can I dispute if I'm just unhappy with a purchase?
No, dissatisfaction with product or service quality does not qualify under FCBA or card rules.
What's the difference between Visa/Mastercard and Amex/Discover dispute windows?
Visa and Mastercard use a 60-day window from the statement date; Amex and Discover extend to 120 days from the transaction date.
How do I contact my issuer if online dispute isn't available?
Call customer service to initiate verbally, or mail a formal dispute letter with details and evidence.
What happens after I file a dispute with American Express?
Amex may send an inquiry to the merchant, allowing 20 days to respond before resolving.
Review your latest statement today and note any suspicious charges. Contact your issuer or merchant promptly to begin recovery.