A check alone is not enough to drain your account, but it opens doors you should close

Someone who has a check from your account can see your routing number, account number, and bank name — the same information printed on every check you write. With just those numbers, they cannot log into your account or move money without your permission. But they can use that information to set up unauthorized automatic payments from your account, create fake checks in your name, or convince your bank they are you. The real risk is not the check itself, but what someone does with the numbers on it.

If you believe a check has been lost, stolen, or seen by someone you do not trust, the steps you take in the next few hours matter. Your bank can flag your account, watch for suspicious activity, and stop payments before they clear. Waiting days or weeks makes recovery much harder.

Key Takeaways

  • A stolen check gives someone your routing and account numbers, which they can use to set up unauthorized automatic payments or create counterfeit checks.
  • You cannot be charged for unauthorized automatic payments if you report them within 60 days of the first fraudulent charge appearing on your statement.
  • Call your bank when ready if a check is lost or stolen — do not wait for your next statement to see if something happens.
  • Ask your bank to flag your account for fraud and to monitor for ACH transfers (automatic payments) and check fraud specifically.
  • If someone has already used your account number to create fake checks, your bank can close the account and open a new one with a different number.

What information on a check can actually be misused

Your routing number identifies your bank. Your account number identifies your specific account at that bank. Together, these two pieces of information are called your bank account number, and they are printed on every check you write. Anyone who receives a check from you — a landlord, a utility company, a friend you paid back — has this information.

With your routing and account numbers, someone can attempt to set up an ACH transfer — an automatic payment that pulls money from your account. They cannot do this through your online banking (they do not have your password), but they can try to set one up through a third-party service, a bill-pay system, or by claiming to be you on the phone with a company. They can also use the numbers to print counterfeit checks and cash them at stores or banks.

What they cannot do with just a check is log into your account, change your password, or move money through your bank's website or app. That requires your username and password, which are not printed anywhere on a check.

Unauthorized automatic payments and your protection window

If someone uses your account number to set up an automatic payment without your permission, federal law protects you — but only if you report it quickly. Under the Electronic Funds Transfer Act, you have 60 days from the date an unauthorized charge appears on your bank statement to report it. If you report within that window, your bank must refund the money and investigate.

After 60 days, your liability increases. If you report after 60 days but within 120 days, your bank may still refund you, but they are not required to. After 120 days, you have no federal protection, and recovery depends entirely on your bank's policies and whether they can trace the money.

This is why checking your statements regularly matters. Many people do not look at their account for weeks or months, and by then the window has closed. If you are worried about a lost or stolen check, ask your bank to send you statements weekly or to alert you to any ACH transfers, even small ones.

Counterfeit checks and what your bank will do

If someone prints fake checks using your account number and routing number, those checks will bounce when the recipient tries to deposit them — assuming the bank catches the forgery. But the damage happens before that. The person who received the fake check may have already given you goods or services. You may face angry calls from people claiming you wrote them bad checks. Your bank may temporarily freeze your account while they investigate.

If your bank determines that counterfeit checks have been created in your name, they will usually close your account and open a new one with a different account number. This stops the counterfeiter from using the old number. You will need to update your direct deposit, automatic bill payments, and any other services linked to the old account number. It is inconvenient, but it is the fastest way to stop the fraud.

What to do if a check is lost or stolen

Call your bank as soon as you realize a check is missing or has been seen by someone you do not trust. Do not wait for your next statement or for a fraudulent charge to appear. Ask to speak with the fraud department, not just a general customer service representative.

Tell the bank the check number, the amount you wrote it for (if any), and the date you wrote it. Ask them to flag your account for fraud and to monitor it for unauthorized ACH transfers and counterfeit checks. Some banks will place a temporary hold on your account or require you to verify any unusual activity for the next 30 to 90 days.

Ask the bank to send you a new set of checks with a different account number if they offer that option. Some banks do this automatically after fraud is reported; others charge a small fee. It is worth the cost to may support the old account number cannot be used.

Protecting yourself if you regularly write checks

If you write checks frequently, consider these steps to reduce risk. Never leave blank checks in your car, mailbox, or anywhere accessible. Do not write checks to "Cash" — write them to a specific person or business. Do not sign blank checks and fill in the amount later. Do not mail checks from your home mailbox; use a post office mailbox or hand them directly to the recipient.

If you use online bill pay through your bank instead of mailing checks, you reduce the window for someone to intercept a physical check. Online bill pay also creates a record in your account, making it easier to dispute if something goes wrong.

Monitor your bank statements weekly, not monthly. Many banks offer free text or email alerts when a deposit is made or a large withdrawal occurs. Set up alerts for any ACH transfer, even small ones. The sooner you spot fraud, the sooner you can report it and stay within the 60-day protection window.

If you have already been charged for unauthorized payments

If you see charges on your statement that you did not authorize, report them to your bank when ready — do not wait until the end of the month. Call the fraud department and ask them to reverse the charges while they investigate. Write down the name of the person you spoke with, the time you called, and what they told you.

Follow up with a written letter to your bank (email is acceptable if they provide an email address for fraud reports). Include the date you called, the charges you are disputing, and the date they appeared on your statement. Keep a copy for your records. This creates a paper trail and ensures your report is documented in case you need to escalate the dispute.

Your bank will investigate and should refund you within 10 business days if the charge is clearly unauthorized. If they deny your dispute, ask why and request the details of their investigation. If you disagree with their decision, you can file a complaint with the Consumer Financial Protection Bureau (CFPB), which oversees bank conduct.

Frequently Asked Questions

Can someone open a new bank account using just my check?

No. Opening a bank account requires a government-issued ID, a Social Security number, and proof of address. A check alone does not provide these. However, someone could use your account number to impersonate you over the phone or online, so report a lost or stolen check when ready.

What if I wrote a check to someone and now I do not trust them?

Call your bank and ask them to stop payment on that check. There is usually a fee (typically $25 to $35), but it prevents the check from clearing. You must do this before the check is deposited. If the check has already cleared, you cannot reverse it through a stop-payment order.

Do I need to close my account if one check is lost?

Not necessarily. If you report it to your bank when ready and they flag your account for fraud, closing is optional. Many people keep the account open and monitor it closely. If fraudulent activity does occur, then closing and opening a new account makes sense. Your bank can advise you based on what they see in your account.

How long does it take for a counterfeit check to show up?

It varies. A counterfeit check might be deposited within days or weeks. Some take months. This is why monitoring your account weekly is important — you want to spot unauthorized activity as soon as possible, not when you reconcile your account at the end of the month.

Can my bank refuse to refund me if I reported fraud late?

Yes, if you report after 60 days. Federal law requires a refund only if you report within 60 days of the charge appearing on your statement. After 60 days, your bank can refuse. After 120 days, you have no federal protection. This is why checking your statements regularly is critical.