A late fee landed on your Klarna plan, or Affirm charged you for something you never saw, or the Afterpay order never showed up and the payments keep rolling anyway. You want a letter that fixes it. The three templates below are built for exactly those situations, and you can copy them straight into an in-app dispute form or an email.

One thing works in your favor: in May 2024 the Consumer Financial Protection Bureau confirmed that BNPL loans accessed through a digital account count as credit cards under federal lending rules. That means the lender has to investigate the disputes you initiate. It can't just bounce you back and forth between the app and the merchant.

Who do you send the letter to, though? That depends on what went wrong, so we'll start with the rules and then get to the wording.

The rule that backs up your letter

The CFPB's interpretive rule treats BNPL lenders that operate through a digital user account as credit card providers under Regulation Z. The agency's announcement says these lenders must investigate disputes that consumers initiate, and the rule exists so people can dispute charges and obtain refunds on BNPL loans. You don't need to quote it verbatim, though mentioning it doesn't hurt, because a lender that can tell you know the protections tends to move a bit faster.

Turns out disputes are common at scale. In the CFPB's industry review, people disputed or returned $1.8 billion in transactions at just five BNPL firms in 2021. Filing one isn't a sign you did something wrong. It's routine.

Know the limits too. The rule covers loans accessed through a digital user account, which is how nearly every major BNPL app works, but it doesn't turn your claim into a guaranteed refund. The Federal Register text has the legal detail if you want it. Your letter still needs facts: what you bought, what went wrong, and what you want done about it.

Get your evidence together first

One page of proof beats three paragraphs of frustration. Pull these together before you touch a template:

• Order number and purchase date, from the confirmation email or the app
• The exact amount and date of the charge or fee, ideally from your bank or card statement
• Screenshots of the problem: the stalled tracking, the merchant's out-of-stock notice, the double charge
• Any messages you've already swapped with the merchant

Screenshot everything before you send. App records can change, and you want your proof fixed in place.

Free dispute letter templates to copy

Match the letter to your problem. Charged a fee you don't owe? Use the first. A charge you never made? The second. Goods that never arrived, or a return credit that vanished? The third. Fill in the brackets, attach the proof, and send it through the lender's dispute channel first, then follow up by email so you have a record outside their system.

Letter 1: Late fee charged in error

Subject: Dispute of late fee on order [order number]

To the dispute team at [Klarna / Afterpay / Affirm / lender name]:

I am disputing a late fee of [$ amount] charged on [date] for order [number]. The payment cleared my bank account on [date], as the attached statement shows, so the fee was applied in error.

Please reverse the fee, correct my account, and confirm in writing that this order is marked as paid on time.

[Your name]
[Email and phone listed on the account]
Attachments: bank statement showing the payment, order confirmation

Letter 2: A charge you never authorized

Subject: Unauthorized charge on account [number or email on file]

I am disputing a charge of [$ amount] on [date] that I did not authorize. I did not make this purchase and I do not recognize the merchant shown.

Please investigate, remove the disputed amount from my balance, and pause any collection activity on it while you do. Confirm your findings in writing.

[Your name]
[Contact details on the account]
Attachments: screenshot of the charge, [police or identity theft report if you filed one]

Letter 3: Item never arrived, or a return the lender ignored

Subject: Dispute of order [number] - item not received

On [date] I bought [item] from [merchant] through [lender]. [The order never arrived / I returned the item on date with tracking number X], yet the installment payments continue and no refund has posted.

I am asking you to investigate this dispute and hold or refund the payments tied to this order while you do. I have attached the order confirmation and my messages with the merchant.

[Your name]
Attachments: order confirmation, tracking record, merchant messages

If the real problem sits with the card you paid with, the FTC's sample dispute letter is the standard format for a written billing error notice to a card issuer. Add your BNPL order number and name the lender so the two cases stay connected.

How the major lenders take disputes

Klarna runs disputes inside the app: open the order, tap the problem, follow the prompts. Its Buyer Protection Policy covers goods that arrive broken or unusable and orders that never show up, and payment can be paused while a missing-order case is open. Read the exclusions before you lean on it. Services, event tickets, gift cards, and cash-equivalent purchases sit outside the policy.

Affirm disputes also start from the purchase in the app, and two details from Affirm's own dispute guidance help you plan. Customers aren't limited to a post-purchase deadline for opening one, and Affirm says the outcome goes to both sides within 15 calendar days of evidence collection. The merchant pays Affirm's dispute fee, not you, so cost isn't a reason to hold back.

Afterpay, Sezzle, and PayPal's Pay in 4 all push you through in-app resolution flows, and to be honest the exact screens change often enough that the durable move is the same everywhere: submit the dispute in the app, then email the matching letter so you have a timestamped copy outside their system, and save whatever the app gives you, ticket number included. That paper trail is what every escalation step later depends on.

BNPL dispute or card chargeback?

Run the BNPL dispute first for anything merchant-related, because the lender can pause collections while it investigates. Keep the chargeback for fraud, or for a lender that has stopped responding. If you paid the installments with a credit card, you can dispute the underlying charge with the issuer in writing; the FTC letter covers the format.

If the lender stalls

Silence past two weeks is your cue to escalate.

1. Day 7: reply to your original dispute, reference the ticket number, and ask for a status in writing.
2. Day 14: file a complaint with the CFPB through its complaint portal. The agency forwards it to the company and tracks the response, which changes the tone fast.
3. Day 30: if the claim involves fraud or a merchant failure and you paid by card, send the written billing error notice to your card issuer.
4. The whole time: keep one running note with dates, names, and ticket numbers. Escalation asks for the paper trail, and rebuilding it from memory is misery.

Questions that come up

Does the lender have to pause my payments during a dispute? Not automatically for every case. The CFPB rule requires the lender to investigate disputes you initiate, and Klarna's policy can pause payment on a missing order. Ask for the pause explicitly in your letter. It costs nothing to request.

How long does an Affirm dispute take? Affirm says the adjudication outcome goes to both sides within 15 calendar days of evidence collection, and you can open a dispute without a post-purchase deadline, per its dispute guidance.

Will disputing a BNPL charge hurt my credit? Filing a dispute itself isn't a negative mark. If a late mark tied to a disputed fee reaches your credit report, dispute that entry with the credit bureau separately and attach your dispute letter as support.

Do these templates work outside the United States? They're written around U.S. rules. If you're in the UK, Australia, or anywhere else, your credit dispute framework differs, so check your local regulator's process before sending. The letter bodies adapt fine; the rights you cite should come from your own country.

Open the app tonight, find the order, and send whichever letter fits. Ten minutes of writing, one screenshot attached, and you've opened a documented case the lender has to answer.