A check is invalid when it fails to meet the legal requirements of a negotiable instrument or gives the bank a reason to refuse it: a missing signature, no named payee, signs of tampering, mismatched dollar amounts, a date more than six months old, a post-dated instruction the bank was warned about, a closed account, insufficient funds, a stop-payment order, a bad endorsement, or damage that keeps automated equipment from reading it. Any one of these can send the check back unpaid.
The Legal Baseline a Check Has to Meet
Under the Uniform Commercial Code, which every state has adopted in some form, a check is only a negotiable instrument if it is an unconditional order to pay a fixed amount of money, payable on demand or at a definite time, and payable to order or to bearer.1Cornell Law Institute. Uniform Commercial Code 3-104 – Negotiable Instrument A writing that fails any of these elements is not a negotiable instrument even if it looks like a check, and a bank has no obligation to process it. Most of the specific rejection reasons below trace back to one of these requirements.
Missing or Incomplete Information
No Signature on the Front
A check without a signature is not enforceable. The UCC states that no one is liable on an instrument unless they signed it or an authorized representative signed on their behalf.2Cornell Law Institute. Uniform Commercial Code 3-401 – Signature Banks compare the signature on a check to the one they have on file. If the signature line is blank, the bank cannot legally debit the account holder’s balance and will return the check unpaid.
A signature does not have to be a traditional handwritten name. It can be made by hand, by machine, or by any mark or symbol adopted with the intent to authenticate the document.2Cornell Law Institute. Uniform Commercial Code 3-401 – Signature If you sign on behalf of a company or trust, the signature should clearly show you are signing in a representative capacity. Otherwise there can be confusion about who is actually liable.
No Payee Named
Leaving the “pay to the order of” line blank creates ambiguity about who is authorized to receive the funds. The UCC allows a payee to be identified by name, account number, office, or other means, but there must be some identification.3Cornell Law Institute. Uniform Commercial Code 3-110 – Identification of Person to Whom Instrument Is Payable Without a payee, the bank has no clear instruction on where the money should go.
Other Blank Fields
A check that is signed but missing other required information, such as the date or the dollar amount, is an incomplete instrument. If someone later fills in the blanks without the signer’s permission, that unauthorized completion is treated the same as an alteration and can discharge the signer’s obligation.4Cornell Law Institute. Uniform Commercial Code 3-115 – Incomplete Instrument Banks routinely reject checks with blank fields because they have no way to confirm the missing information was filled in correctly.
Amount Discrepancies and Signs of Tampering
Every check has two places for the dollar amount: the numerical box and the written line. When the two disagree, the UCC provides a tiebreaker: the written words control over the numbers.5Cornell Law School. Uniform Commercial Code 3-114 – Contradictory Terms of Instrument So if you write “five hundred” on the line but enter “$50.00” in the box, the check is legally for $500. In practice, many banks refuse to process a check with mismatched amounts rather than apply this rule, because the discrepancy suggests the check may have been changed after signing.
Any unauthorized change to a check qualifies as an alteration under commercial law. A fraudulent alteration discharges the obligation of the person whose liability is affected, meaning the original signer is generally no longer on the hook for the altered amount.6Cornell Law School Legal Information Institute. Uniform Commercial Code 3-407 – Alteration Banks watch for correction fluid, scratched-out text, mismatched ink colors, and writing squeezed into available space. Any of these will get the check returned.
Date Problems
Too Old
A bank is not obligated to pay a check presented more than six months after the date written on it.7Cornell Law School / Legal Information Institute (LII). Uniform Commercial Code 4-404 – Bank Not Obliged to Pay Check More Than Six Months Old The rule is permissive, so a bank can still choose to honor an older check in good faith, but most treat a stale date as a red flag and return it. If you are holding a check that is nearing six months, deposit it or ask the issuer for a replacement.
Certified checks are an exception. Because the bank has already set aside the funds and accepted the obligation to pay, the six-month cutoff does not apply.7Cornell Law School / Legal Information Institute (LII). Uniform Commercial Code 4-404 – Bank Not Obliged to Pay Check More Than Six Months Old
Federal Government Checks
U.S. Treasury checks have their own timeline. Federal law requires that a Treasury check be negotiated within 12 months of its issue date, after which the Treasury cancels it and returns the funds to the issuing agency.8Office of the Law Revision Counsel. 31 USC 3328 – Paying Checks and Drafts If you missed the window on a tax refund, Social Security payment, or other federal check, contact the issuing agency for a replacement. Replacements can generally be issued up to six years from the original date.
Post-Dated Checks
Writing a future date does not automatically stop the bank from processing the check early. A bank can charge the account for a post-dated check before the stated date unless the account holder gives the bank advance notice describing the check. That notice is effective for the same period as a stop-payment order, six months, and must arrive in time for the bank to act on it.9Legal Information Institute. Uniform Commercial Code 4-401 – When Bank May Charge Customers Account If a bank charges the account early despite proper notice, it is liable for damages, including fees from other checks that bounce as a result.
Account and Funding Issues
Not Enough Money
A check bounces when the account does not have enough money to cover it. The bank stamps it NSF, for non-sufficient funds, and returns it. Both the check writer and the depositor typically get hit with fees. The average bank NSF fee has fallen in recent years, to roughly $17 in 2025, though some banks still charge more. The depositor’s bank often adds a separate deposited-item-returned fee.
Closed Account
A check drawn on a closed account is rejected immediately. There is no active account to debit, so the bank returns it with a closed-account notice. This can carry more serious consequences than a plain NSF return: in many states, writing a check on an account you know is closed can be treated as fraud.
Stop-Payment Order
The person who wrote a check can instruct their bank to refuse payment by placing a stop-payment order. Once the bank receives it with enough time to act, it must block the transaction. An oral order expires after 14 calendar days unless confirmed in writing. A written order lasts six months and can be renewed for additional six-month periods.10Cornell Law School. Uniform Commercial Code 4-403 – Customers Right to Stop Payment If the order lapses and the check is presented again, the bank may pay it. Banks typically charge $30 to $35 each time an order is placed or renewed.
Endorsement Problems
The back of the check matters as much as the front. A payee has to sign the back to negotiate the check, whether that means depositing it, cashing it, or transferring it. Without a proper endorsement, the bank may refuse the deposit.
If the payee’s name is misspelled on the front, the payee can sign using the name as written, their actual name, or both, and the receiving bank can require both signatures before accepting the deposit. Checks made out to two people using “and” typically need both signatures; checks using “or” can be endorsed by either person.
A restrictive endorsement like “for deposit only” limits how the check can be used. If a bank or non-bank purchaser takes a check with that restriction and the proceeds are not applied consistently with it, they can be held liable for conversion.11Legal Information Institute (LII) / Cornell Law School. Uniform Commercial Code 3-206 – Restrictive Indorsement For mobile deposits, most banks now require you to write something like “for mobile deposit only” on the back. Skipping that endorsement is one of the most common reasons a mobile deposit gets rejected.
Physical Damage and Unreadable Print
Banks process checks through automated systems that scan and read the document electronically. A check that is torn, water-damaged, or heavily stained may be unreadable, and the bank will reject it as unprocessable.
The most critical part for automated processing is the MICR line along the bottom edge. It carries the routing and account numbers in special magnetic ink that scanners use to route funds through the payment system.12Cornell University Division of Financial Services. Spotting Forged Checks If the MICR line is smudged, torn, or printed with regular ink instead of magnetic ink, the equipment cannot identify where to send the payment, and the check will be returned.
Duplicate Presentment After a Mobile Deposit
Depositing a check through a banking app creates an electronic image that enters the payment system in place of the paper. Under the Check 21 Act, a properly created substitute check or electronic image is the legal equivalent of the original paper check.13Federal Reserve. Frequently Asked Questions About Check 21 Once the electronic image has been processed, the original paper check is effectively spent. Depositing the same paper check at a branch or ATM afterward, or submitting a second mobile image, is duplicate presentment, and the second deposit will be rejected or reversed.
For the electronic image to clear, it must accurately capture all information on the front and back, including the MICR line.14Federal Reserve. Regulation CC – Availability of Funds and Collection of Checks Blurry photos, poor lighting, or a check that does not fit within the camera frame can cause rejection. If the app accepts a poor image, the receiving bank may still return the deposit during processing.
Even Cashier’s and Certified Checks Can Be Refused
Certified checks and cashier’s checks are usually treated as guaranteed funds because the issuing bank has already committed to pay. Even so, a bank can decline payment without liability in a few narrow situations: the bank has suspended payments or been placed in receivership; the bank has reasonable grounds to believe it has a claim or defense against the person trying to cash the check, such as evidence of fraud; the bank reasonably doubts that the person presenting the check is the person entitled to payment; or payment is prohibited by a court order, regulatory freeze, or sanctions obligation.
Outside those situations, refusing to pay a certified or cashier’s check can expose the bank to liability for the payee’s expenses and consequential damages.15Legal Information Institute (LII) / Cornell Law School. Uniform Commercial Code 3-411 – Refusal to Pay Cashiers Checks, Tellers Checks, and Certified Checks
What Happens if You Wrote the Bad Check
Writing a check you know will not be honored can lead to criminal charges and civil liability, not just banking fees. The line between an honest mistake and a crime turns on intent.
Every state has laws making it a crime to issue a worthless check with the intent to defraud. Prosecutors generally must prove you knew the check would not be paid at the time you wrote it. Many states allow courts to infer intent when the check bounces and you fail to make it good within a set number of days after receiving notice, often 7 to 30 days depending on the state. Accidentally overdrawing does not usually trigger criminal charges as long as you cover the shortfall promptly. Small amounts are typically charged as misdemeanors; larger amounts, often above $500 to $2,500 depending on the jurisdiction, can be charged as felonies with potential prison time. Repeat offenses can also elevate the charge.
Separately, the person who received the bad check can sue you. Most states allow the payee to recover the face amount plus additional statutory damages. Some permit two or three times the check amount; others cap additional damages at a fixed dollar figure. Many states require the payee to send a written demand and wait 10 to 30 days before filing suit, and paying up during that window often lets you avoid the extra penalties. Merchants may also charge a returned-check fee, which state law typically caps somewhere in the range of $20 to $50.