How to File an Amex Credit Card Dispute

A step-by-step guide to disputing an American Express charge, from when a dispute fits to what happens after you file.

Written: October 5, 2026

What a credit card dispute is, and when to use it

An Amex credit card dispute is a formal claim you file with American Express when a charge on your statement is wrong. You are asking the card issuer to look into the charge and remove it if it should not be there. A dispute fits when the problem is with the charge itself, not with something you simply regret buying.

Valid reasons to dispute an Amex charge

Federal rules set out what counts as a billing error on a credit card. Regulation Z says a charge not made by you or someone allowed to use your card is a billing error. The Fair Credit Billing Act says a charge for the wrong amount is one too. Regulation Z also covers goods or services not delivered as agreed. It covers a payment or credit the statement fails to show, and a math error the card issuer made. Regulation Z also covers a charge you ask the card issuer to explain, with documents as proof.

One thing does not count. Regulation Z does not treat a complaint about the quality of something you accepted as a billing error. The Consumer Financial Protection Bureau says defective goods or services may need a different dispute process. For more on what fits, read valid reasons to dispute a charge.

Before you dispute: contact the merchant first

American Express asks you to contact the merchant before you open a dispute. Chase's guide says a merchant may fix a charge error in a few days, while a bank can take weeks. Save any reply you get, because it shows you tried.

There is one exception. Regulation Z says you need not contact the seller first about goods or services not delivered as agreed.

How to dispute an Amex charge

American Express lets you dispute a charge online by picking it from your list of transactions.

One rule matters most. Regulation Z gives you 60 days to get a written notice to the card issuer. The 60 days start when the card issuer sends the first statement that shows the error. The Fair Credit Billing Act counts the sixty days the same way. The Consumer Financial Protection Bureau says a call is not enough on its own. You must also send a written billing error notice to protect your rights.

A notice sent electronically counts as written, if the card issuer says it accepts notices that way. Regulation Z also lets a card issuer refuse notices written on the payment slip, if its billing rights statement says so.

What your notice needs to say

Regulation Z says the notice must reach the address the card issuer gives for billing errors. It must let the card issuer identify your name and account number. It should give the error's type, date and amount, and why you think it is wrong. See how long you have to dispute a charge for more on the deadline.

Gather your proof before you file. Keep receipts, order emails, photos of what arrived, and messages you sent the merchant, with dates. The Consumer Financial Protection Bureau says to keep copies and write down the dates of follow-up calls.

What happens after you file

Regulation Z gives the card issuer 30 days after it receives your notice to confirm it in writing. That written reply is dropped if the card issuer resolves the error within those 30 days.

Then the investigation runs. Regulation Z says the card issuer must do a reasonable investigation before it finds there was no error.

How long the Amex dispute process takes

Regulation Z gives the card issuer 2 complete billing cycles after it receives your notice to resolve the error. It must resolve the error no later than 90 days after it receives the notice. The Fair Credit Billing Act sets the same limit. For a fuller picture, read what happens after you dispute a charge.

Paying your bill during the dispute

Regulation Z says you need not pay the disputed amount or its related charges during the dispute. Regulation Z bars the card issuer from trying to collect it, such as in court, and from reporting you as late for not paying it. The card issuer may still collect the part of the bill not in dispute, and it may count the disputed amount against your credit limit.

The Consumer Financial Protection Bureau says money already paid likely comes back only after the card company agrees with the cardholder. Debit card disputes work differently. See what is provisional credit.

What if Amex finds no error

Regulation Z says a card issuer that finds no error must explain why in writing. Ask for copies of its proof, because Regulation Z says the card issuer must send them if you ask. The Consumer Financial Protection Bureau says the card company must also say how much is owed and when.

Some denials are barred. Regulation Z bars denying a claim only because you did not sign a sworn statement or file a police report. The Fair Credit Billing Act says a claim of goods not delivered cannot be denied unless the card issuer finds they were sent. And Regulation Z says a card issuer that never explains in writing why there was no error generally must credit the disputed amount.

If you still owe the amount, Regulation Z gives you at least 10 days to pay before a bad credit report. If you find there was no error after all, Regulation Z lets you withdraw the notice by phone, electronically or in writing. For next steps, see what happens if you dispute a charge and lose.

Tips for a successful dispute

File in writing, and keep copies of everything you send.
Watch the 60-day clock from the statement date. Do not wait on the merchant if it is running out.
Send only true facts. Never claim a charge is wrong if you made it and got what you paid for.
A charge you already paid can still be disputed, the Consumer Financial Protection Bureau says.
If the card issuer fixes the error, Regulation Z says it must credit the account and send a correction notice.
No one can promise a dispute will win.