How to Deposit Cash or Checks at a Credit Union ATM

To deposit cash or checks at a credit union ATM, use your credit union’s app or ATM locator to confirm the machine accepts deposits, prepare your bills and endorse your checks before you arrive, insert your card and enter your PIN, follow the on-screen prompts to feed the cash or checks into the intake slot, review the amounts the machine detected, and keep the receipt until the deposit posts to your account.

The details below cover the parts people get wrong: picking the right machine, prepping so the scanner doesn’t reject your deposit, and knowing when the money actually becomes spendable.

Find an ATM That Takes Deposits

Not every credit union ATM accepts deposits. Many machines in shared networks only handle withdrawals and balance inquiries. The CO-OP ATM network connects members to over 37,000 surcharge-free machines, but only about 8,000 of those are deposit-taking terminals.¹ A CO-OP logo on the machine does not guarantee it accepts deposits.

Open your credit union’s mobile app or online ATM locator before you head out. Most locators let you filter for deposit-capable machines. ATMs at your credit union’s own branches, or within roughly 50 feet of them, almost always take deposits and come with faster fund availability.

One thing that trips people up: CO-OP shared branching and CO-OP ATMs are separate services. Shared branching lets you walk into another credit union’s lobby and transact with a teller. Some shared branching locations do not allow deposits at their outdoor ATMs even though the teller inside can process one. Confirm the specific machine’s deposit capability before you drive over.

Prep Your Cash and Checks

Bring your debit or ATM card and your PIN. Some newer machines support tap-to-authenticate through a mobile wallet, but availability varies, so the physical card is the reliable option.

Cash

Take off any staples, paper clips, or rubber bands. Straighten wrinkled or folded bills so the internal scanner can read the denominations. Crumpled currency is the most common reason machines reject a first attempt. Most credit union ATMs accept somewhere around 30 to 50 bills per transaction, so a thick stack may need to be split across insertions.

Checks

Sign the back in the endorsement area, and below your signature write “For deposit only” along with your account number. That restrictive endorsement stops anyone else from cashing the check if it is lost. Make sure the front is legible and free of stains or tears the scanner might misread.

Making the Deposit

Insert your card and enter your PIN. Choose “Deposit” from the menu, then select cash, checks, or both if the machine handles them separately. The intake slot or envelope tray will open.

Most modern deposit ATMs are imageable, meaning they scan each bill and check individually and show the detected amounts on screen. Read the totals carefully. If the machine misreads a bill or check amount, you can usually correct it before confirming. Approve the totals and the machine prints a receipt.

Keep the receipt. It is your only proof of the transaction until the deposit posts, and you will need the details if anything goes wrong. Do not stand at the ATM counting remaining cash or updating your register. Do that in your car or at home.

When the Money Becomes Available

Federal law under Regulation CC sets how long a credit union can hold your funds before you can withdraw or spend them. The rules turn on whether you deposited cash or checks, and whether the ATM belongs to your credit union or to another institution.

Cash

Cash deposited at a proprietary ATM, meaning one owned by or located at your credit union, generally becomes available by the next business day. Cash deposited at a nonproprietary ATM can be held up to five business days.² If you need quick access, use your own credit union’s machine.

Checks

For checks deposited at a proprietary ATM, the first $275 of your total daily check deposits must be available by the next business day.³ The rest typically clears within two business days for local checks, though your credit union’s schedule may vary. For checks deposited at a nonproprietary ATM, the entire amount can be held up to five business days, and the $275 next-day rule does not apply.²

Large Deposits and Extended Holds

If your total check deposits on a single day exceed $6,725, the credit union can place an extended hold on the amount above that threshold.⁴ The excess portion can be held up to an additional seven business days. Extended holds also apply if your account is less than 30 days old, has a history of overdrafts, or if the credit union has reasonable cause to doubt the check will clear. The credit union has to notify you when it places an extended hold and tell you when the funds will be available.

Cut-Off Times

Deposits made after the daily cut-off time count as the next business day’s deposit. Cut-offs vary by institution but commonly fall between 2:00 PM and 5:00 PM local time. Weekend and federal holiday deposits roll to the next business day. Check the disclosure or app for the exact ATM cut-off, which can be different from the branch cut-off.

Cash Deposits Over $10,000

When you deposit more than $10,000 in cash in a single day, the credit union has to file a Currency Transaction Report with the Financial Crimes Enforcement Network.⁵ This applies to physical currency, not checks. The filing is routine. The credit union handles it automatically, and you do not need to do anything.

What will get you in trouble is structuring, which means deliberately splitting deposits into smaller amounts to stay under the $10,000 threshold. Breaking a $15,000 cash deposit into three $5,000 pieces across consecutive days is a federal crime punishable by up to five years in prison.⁶ If you legitimately need to deposit a large amount, deposit it. The report is paperwork for the credit union, not a flag against you.

If the ATM Makes a Mistake

Deposit errors happen. The machine might credit the wrong amount, fail to record a deposit, or jam and swallow your cash without processing it. Regulation E covers electronic fund transfers, including ATM transactions, and gives you a defined process.

You have 60 days from the date your credit union sends the statement showing the error, or the statement that should have shown the deposit, to notify the credit union. Contact them by phone or in writing with your name, account number, and a description of what happened.⁷

Once you report, the credit union has 10 business days to investigate and resolve the claim. It can extend to 45 days total, but only if it provisionally credits your account for the disputed amount within the initial 10 business days.⁷ The provisional credit lets you use the money while the investigation continues. If the credit union concludes no error occurred, it can reverse the credit after notifying you and explaining why. Hold onto your receipt until the deposit is correctly posted.

Staying Safe at the Machine

Deposits deserve more caution than withdrawals because you are arriving with cash or checks already in hand.

Use well-lit, indoor ATMs when possible. Machines inside credit union lobbies, grocery stores, or other monitored spaces are less likely targets for tampering or robbery.
Look at the machine before inserting your card. Anything loose, crooked, or scratched around the card slot or keypad is a warning sign. Skimming overlays sit on top of the real card reader and often look slightly off. Use a different machine if something seems wrong.⁸
Cover the keypad with your free hand when entering your PIN. Pinhole cameras mounted above the keypad are a common way thieves capture PINs alongside skimmed card data.⁸
Have everything ready before you approach. Organize bills and endorse checks in advance. Less time at the machine means less exposure.
Save review for later. Take your receipt and card, then verify amounts from your car or home rather than lingering at the terminal.

1
Velera. Nationwide ATM Network for Credit Unions
2
eCFR. 12 CFR Part 229 – Availability of Funds and Collection of Checks (Regulation CC)
3
eCFR. 12 CFR 229.10 – Next-Day Availability
4
eCFR. 12 CFR 229.13 – Exceptions
5
FinCEN. Frequently Asked Questions Regarding the FinCEN Currency Transaction Report (CTR)
6
Office of the Law Revision Counsel. 31 USC 5324 – Structuring Transactions to Evade Reporting Requirement Prohibited
7
Consumer Financial Protection Bureau. 12 CFR 1005.11 – Procedures for Resolving Errors
8
United States Secret Service. U.S. Secret Service Kicks Off 2026 EBT Fraud and ATM Skimming Outreach Operations