A complaint letter won't erase a loan. It still matters because it dates your claim, names the account, and lists each disputed charge in writing.

Did a fee appear that your contract never listed?

Copy the sample below, replace every bracket with your details, attach statement copies, and keep the originals at home so you aren't mailing away your only proof. Save a scanned copy as well. To be honest, a calm letter with exhibits beats an unlogged phone rant. If the company never answers, reuse that packet when you submit a complaint to the CFPB.

This page is for U.S. borrowers. It isn't legal advice. It does not promise a refund.

Sample loan contract complaint letter

Paste this into a document. Replace every bracket with your real information.

[Your Name]
[Street Address]
[City, State ZIP]
[Email]
[Phone]
[Date]

[Lender Name]
Complaints Department
[Lender Address]
[City, State ZIP]

Re: Complaint on loan account [Account Number]

Dear Complaints Department:

I am writing about my loan dated [Loan Date] for [Original Amount], account [Account Number].

I dispute the following items because they do not match the written loan agreement or the account history I have:

1. [Description of fee or charge] of $[Amount] posted on [Date]. I do not see authorization for this charge in the agreement.
2. [Misapplied payment, rate change, or other issue] on [Date] involving $[Amount].

I have enclosed copies of the loan agreement, statements, and related messages. I am not refusing to pay amounts that are not in dispute.

I request a written response that:
1. Refunds or reverses the disputed total of $[Total].
2. Corrects the account so the same item does not post again.
3. Explains any item you will not reverse, with the contract language you rely on.

Please write to the address above. If I do not receive a written response, I may file a complaint with the Consumer Financial Protection Bureau.

Sincerely,
[Your Name]
[Account Number]

Enclosures: agreement copy; statements dated [Dates]; other supporting pages

What to put in the letter

Thing is, the person who opens this file will not know your story. Lead with the account number, then one charge at a time.

Write the posting date, the exact amount, and the statement page that shows it. If a contract clause matters, quote a few words and name the section instead of calling the whole loan predatory.

Skip the speech about the industry. Add the date of any prior call, the reference number, and what you were told.

That short recap stops the company from treating your letter as brand new.

Stack several fees in date order when they ran across three months, so nobody rebuilds your account from rounded totals and a frustrated paragraph. Rounded totals look sloppy on paper.

Enclose copies of:

• The loan agreement pages that cover fees, interest, and how payments get applied
• Each statement that shows a disputed line
• Emails or chat logs about the same charge

Keep the originals and mail copies only.

Which address depends on the problem

A lender complaints desk is the right first stop for an unexplained fee or a payment that hit the wrong bucket. Mortgage servicing errors have extra federal procedures. A wrong late mark on a credit file needs a bureau dispute too.

Don't send the same generic rant to all three. Match the mailbox to the problem.

Mail it so you can prove the date

I know it feels tedious to print the statements, highlight the bad line, check that the highlighted copy is the one in the envelope and the clean copy is the one in the folder, and then wait for a certified-mail receipt when a web form would be faster, but that extra trip is often what lets you show a delivery date later.

1. Sign the letter and photocopy the whole packet.
2. Send it by certified mail with return receipt, or another tracked service that records delivery.
3. If the lender lists a complaints email, send the same PDF that day.
4. Store the tracking number with the PDF.
5. Mark a check-in on your calendar about two weeks later.

You send the letter, you keep the copy, you keep the tracking number, and if you do nothing else that week, at least put the tracking number where you can find it.

A private letter doesn't start the CFPB response clock. Companies generally respond in 15 days once a CFPB complaint reaches them.

If the lender never answers

Use the CFPB complaint portal, where many complaints get forwarded to the company. You can attach documents and check status by email.

You'll have 60 days to leave feedback once the company responds. Turns out the cleanest filings already look like your letter: account number, dates, amounts, and the fix you asked for. Attach the pages that show the error.

The portal takes complaints about personal loans, mortgages, payday loans, debt collection, credit reporting, and other products listed there. Leave the rest in the folder.

You may not need a lawyer to mail the first letter

A first complaint about a posted fee or a misapplied payment is something many borrowers handle themselves. Talk with a lawyer if you have been served, the home is in foreclosure, or the disputed sum is large enough that a wrong step could put you in default.

Wrong credit report entries need a different letter

The lender letter above won't, by itself, correct Equifax, Experian, or TransUnion. Use the FTC sample letter for credit bureau disputes when the report is the problem.

Mail copies to the bureaus and keep your originals. Open a blank document today, paste the loan sample, fill in one charge you can prove, and put the tracking number in the same folder as the PDF. That packet is enough to start.