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How to Dispute a Bill You Do Not Recognize

Five steps from "what is this" to "removed from my account" — without missing the deadline that locks you in.

Updated April 29, 2026 · By the DeftBrain team

An envelope shows up. The logo is unfamiliar. The amount is odd. You open it and there is a bill from a company you have never heard of, or one you used once two years ago, for charges that do not match anything you bought. Your first thought: scam. Your second thought: what if it is real and I ignore it and it goes to collections.<br/><br/>Both possibilities exist. The good news is that the same first step handles both: dispute it in writing, on time, with the right language. After that you find out which it was.

The dispute sequence, in the order that protects you.

How to do it
1

Find the dispute deadline before you do anything else

Federal law gives you 60 days from the first statement to dispute most charges in writing. Some bill types (like medical) have different windows. Look at the statement for a "billing rights" or "dispute" section, or look up the company policy online. The clock starts the day the bill was sent, not the day you opened it. Missing the window is what turns "I do not owe this" into "I do, actually, because I waited."

2

Send the dispute in writing, not by phone

A phone call to a customer service rep does not legally count as a dispute. You need a letter, an email, or a portal submission with a record. Use the address listed for billing inquiries — not the payment address, which goes to a different department. Keep it short: "I am disputing the charge of [amount] on the statement dated [date]. I have no record of authorizing or receiving this service. Please provide documentation showing the basis for this charge."

3

Do not pay the disputed amount while it is being investigated

If you pay, you forfeit some of your dispute rights. You can pay the rest of the bill (the parts you do recognize) — just not the disputed line. By law, the company cannot send the disputed amount to collections or report it as delinquent while a written dispute is open. They have 30 days to acknowledge your dispute and 90 days to resolve it.

4

If they cannot prove the charge, it has to come off

When you dispute and ask for documentation, the company must show you what you actually agreed to or received. If they cannot — no signed agreement, no service log, no delivery confirmation — they have to remove the charge. This is where most fraudulent or mistaken charges fold. The company assumed you would pay without asking, and asking is enough.

5

Escalate if they ignore the dispute

If the company stalls, ignores you, or threatens collections while a dispute is open, file a complaint with the Consumer Financial Protection Bureau, your state attorney general, or the BBB. For credit card charges, dispute through the card issuer instead — issuers are required to credit your account during the investigation. Most issuers reverse fraudulent charges quickly because they have stronger leverage with merchants than you do alone.

Try it now — free

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