A debit memo, short for debit memorandum, is a notice that money has been subtracted from your bank account or added to what you owe a business. Banks issue them for fees, corrections, garnishments, and returned deposits. Businesses use them to fix invoices when the original amount was too low or too high. If an unfamiliar debit memo shows up on your bank statement, federal law generally gives you 60 days from the statement date to dispute it and trigger a formal investigation.
You’ll sometimes hear people call it a “debt memo.” That’s a mishearing. The accounting term is debit memorandum, and in bookkeeping a debit against your checking account reduces what the bank owes you, which is why your available balance drops. A debit memo isn’t a separate payment or transfer you made. It’s the paper trail for a change that didn’t come from a check you wrote or a card you swiped. The mirror-image document, which adds money back, is a credit memo.
Why Banks Issue Debit Memos
Banks have broad legal authority to charge your account for items that are “properly payable” — transactions you authorized or fees you agreed to in your account terms.1Cornell Law School / Legal Information Institute. Uniform Commercial Code 4-401 – When Bank May Charge Customers Account Most of the debit memos on a typical statement fall into a handful of categories.
Monthly maintenance fees are the most routine. The national average for a basic checking account runs about $14 per month, and premium accounts can charge more. These fees are spelled out in your account agreement and usually appear on the same day each month.
Returned items and insufficient funds produce another common debit memo. If you write a check or set up a payment your balance can’t cover, the bank either bounces the transaction or covers it through overdraft protection, and a fee is debited either way. These charges have historically run around $35 per occurrence, though many large banks have reduced or eliminated nonsufficient-funds fees since 2022. Check your bank’s current fee schedule.
ATM surcharges from out-of-network withdrawals average close to $5 per transaction when you combine the ATM operator’s fee with your own bank’s charge. They sometimes post a day or two after the withdrawal itself.
Other common bank debit memos include stop-payment orders (typically $15 to $36), outgoing wire transfers (up to $40 for domestic wires), cashier’s check fees, and returned deposit items where a check you deposited bounced. In each case, the bank debits the amount and generates a memo as the record.
Debit Memos on Business Invoices
Outside of banking, a debit memo adjusts what’s owed between business partners without voiding and reissuing the whole invoice. Which side sends it depends on the situation.
A seller sends a debit memo to a buyer when the original invoice was too low, for example because shipping costs were left off, sales tax was calculated at the wrong rate, or additional services were performed after the invoice went out. The memo references the original invoice number and the additional amount owed, so the buyer’s accounting team can match it to the right transaction.
A buyer can also issue a debit memo back to a seller when goods arrive damaged, the wrong items ship, or the quantity falls short. Under the Uniform Commercial Code, a buyer who notifies the seller of their intent can deduct damages from any remaining balance due on the same contract.2Cornell Law School / Legal Information Institute. Uniform Commercial Code 2-717 – Deduction of Damages From the Price The notice has to come before the deduction; a buyer can’t silently short-pay an invoice and label it a debit memo after the fact. In practice, the seller typically responds with a credit memo acknowledging the adjustment, and the two documents together create a clean audit trail.
When the Debit Memo Is a Garnishment or Tax Levy
Not every debit memo is a fee or an invoice correction. If a court orders a bank account garnishment, or the IRS issues a tax levy, your bank processes the seizure as a debit memo. These are the ones that catch people most off guard, because the amounts can be large and the bank acts without asking permission.
Federal rules protect certain money from garnishment. If your account receives federal benefit payments such as Social Security, veterans’ benefits, or federal retirement, the bank must calculate a “protected amount” based on the benefits deposited during a two-month lookback period before the garnishment order arrived.3eCFR. 31 CFR Part 212 – Garnishment of Accounts Containing Federal Benefit Payments The protected amount is either the total federal benefits deposited during that window or your current account balance, whichever is lower. The bank cannot freeze that money, and you keep full access without filing any paperwork.
Anything above the protected amount can be frozen under the bank’s standard garnishment procedures. If you believe the garnishment itself is improper, you’ll need to challenge the underlying court order. Disputing the debit memo with the bank won’t help, because the bank is legally required to comply.
How to Dispute a Bank Debit Memo
If a debit memo looks wrong — an unauthorized fee, an incorrect amount, or a transaction you didn’t make — you have the right to dispute it. The clock starts the moment your bank sends the statement containing the entry, and the rules are specific.
The 60-Day Deadline
For electronic fund transfers, meaning debit card transactions, ACH payments, ATM withdrawals, and similar electronic debits, federal law requires you to notify your bank within 60 days of the statement date showing the error. That window is what forces the bank to follow the formal error resolution procedure. Miss it, and the bank is no longer required to investigate or correct the problem.4Consumer Financial Protection Bureau. Regulation E Section 1005.11 – Procedures for Resolving Errors The practical lesson is blunt: review every statement the month it arrives.
These protections apply specifically to electronic transfers. If the debit memo is for a paper check item or a fee that was properly disclosed in your account agreement, your dispute rights depend on your bank’s internal policies and your account contract rather than the federal error resolution rules.
Filing the Dispute
Start by calling your bank. An oral notice is enough to trigger the 60-day clock and begin the investigation. Follow up in writing immediately, because the bank can require written confirmation within 10 business days of your call, and if you don’t provide it, the bank can drop the investigation without liability.5Office of the Law Revision Counsel. 15 USC 1693f – Error Resolution
Send your letter to the address your bank lists for billing disputes or errors, not the general mailing address for payments. Use certified mail with a return receipt so you have proof of delivery.6Federal Trade Commission. Sample Letter for Disputing Credit and Debit Card Charges Include your name, account number, the date and amount of the debit memo, and a clear explanation of why you believe it’s wrong. Attach copies of receipts or prior statements that back you up. Keep the originals.
Investigation Timelines and Provisional Credit
Once the bank receives your notice, it has 10 business days to investigate and report the results. The bank can extend the investigation to 45 calendar days, but only if it provisionally credits your account for the disputed amount within those first 10 business days.4Consumer Financial Protection Bureau. Regulation E Section 1005.11 – Procedures for Resolving Errors That provisional credit gives you access to the money while the bank works. If the bank believes the error involved an unauthorized transfer, it can hold back up to $50 from the provisional credit.
The investigation window stretches to 90 calendar days in three situations: the transaction happened at a point-of-sale terminal (including debit card purchases), the transfer originated outside the United States, or your account was opened within the last 30 days.4Consumer Financial Protection Bureau. Regulation E Section 1005.11 – Procedures for Resolving Errors
If the bank confirms the error, it issues a credit memo reversing the debit and sends you written notice of the correction. If the bank concludes no error occurred, it must mail you a written explanation within three business days of finishing the investigation.5Office of the Law Revision Counsel. 15 USC 1693f – Error Resolution You can ask for copies of the documents the bank relied on. At that point, any provisional credit gets reversed, so watch your balance if you’ve been spending against it.
What Happens If You Miss the 60-Day Deadline
Miss the 60-day window and the bank is no longer obligated to follow the federal error resolution process, investigate the dispute, or provisionally credit your account. For most types of errors, you have no further recourse under Regulation E.
One narrow exception exists. If the debit memo involved an unauthorized electronic transfer, the bank must still apply the liability rules before holding you responsible for the full amount.4Consumer Financial Protection Bureau. Regulation E Section 1005.11 – Procedures for Resolving Errors Your potential liability grows the longer you wait. Reporting within two business days of learning about an unauthorized transfer caps your loss at $50. Reporting after two days but within 60 days caps it at $500. After 60 days, you could be on the hook for the entire amount.
The simplest protection is a habit. Check your statements within a week or two of receiving them, and if anything looks unfamiliar, call the bank that day. You can handle the written follow-up afterward, but getting the oral notice on record early preserves every protection the law gives you.