Reference
VIOC on a Bank Statement, and 30 More Codes Decoded
VIOC is the code people look up most, and it is not fraud. Below is what it means, followed by 30+ other bank statement abbreviations that mean nothing without a decoder.
March 6, 2026 · 7 min read
Quick answer
VIOC is Valvoline Instant Oil Change — an ordinary card charge from a Valvoline service centre, usually shown as VIOC #1234 with the store number, not a fraudulent one. The other codes here — EDI payment, counter credit, reversal, ACH, NSF, preauth — are transaction labels, payment network codes, or bank fee descriptions, and most are normal once decoded. Unexpected fees, ACH debits, or unfamiliar merchant codes are still worth checking immediately.
For confusing merchant names specifically — where you recognize a charge amount but not who took it — our billing descriptor lookup can match the payment processor name back to the actual business.
Valvoline Instant Oil Change. The digits after the hash are the service center's store number, and the town beside them is that centre's location — so VIOC #1234 CHICAGO IL is store 1234 in Chicago, not an online charge. It can also appear as VIOC, VIOC INSTANT OIL CH, or VALVOLINE INSTANT OIL. Like most fuel and service-station charges it is often authorized on the day and only settles two to three days later, so the date on your statement can sit a few days after the visit.
⚠ Watch out:Not fraud. It is a real Valvoline charge, so it matches an oil change, tire rotation, or fluid top-up. If nobody on the account has been to a Valvoline, compare the store town with where you live before disputing — a card tested by a stranger rarely posts at a physical service center.
e.g. VIOC #1234 CHICAGO IL
Electronic Data Interchange. A standardized electronic transfer format used primarily by businesses to pay suppliers, vendors, or contractors. If you see EDI PAYMENT on your statement, it means you received or sent a business-to-business payment via the EDI network.
✓ No concern:None — legitimate business payment format.
e.g. EDI PAYMENT ACME CORP
COUNTER CREDIT
Deposit typeA cash or check deposit made in person at a bank teller window ("over the counter"). The term distinguishes a branch deposit from an ATM deposit, mobile deposit, or direct transfer. Your balance increases immediately or within one business day.
✓ No concern:None — standard in-branch deposit.
e.g. COUNTER CREDIT 11/15
A transaction that was undone by the bank or merchant. This can mean: a duplicate charge was reversed, a merchant refunded a transaction at the processing level, or the bank corrected an error. A reversal credits back the original amount.
⚠ Watch out:Usually none — but verify the original transaction was correctly reversed. If you see a reversal you didn't expect, contact your bank.
e.g. REVERSAL ACH DEBIT 10/30
ACH DEBIT / ACH CREDIT
Transfer typeAutomated Clearing House. The ACH network processes electronic transfers between bank accounts — direct deposits, bill payments, and peer transfers. ACH DEBIT means money left your account; ACH CREDIT means money came in.
✓ No concern:None for expected transfers. An unexpected ACH DEBIT may indicate an unauthorized recurring charge — dispute immediately if unrecognized.
e.g. ACH DEBIT PROGRESSIVE INS / ACH CREDIT EMPLOYER PAYROLL
PREAUTH / PRE-AUTHORIZATION
Temporary holdA temporary hold placed on your account by a merchant before the final charge is settled. Common at gas stations (which hold $1–$125), hotels, and car rentals. The hold is not a final charge — it disappears when the real charge posts.
⚠ Watch out:Normal. The hold will release and be replaced by the actual charge within 1–5 business days.
e.g. PREAUTH SHELL OIL / PREAUTH MARRIOTT HOTELS
Non-Sufficient Funds. A fee charged when a payment or withdrawal was attempted but your balance was too low to cover it. The transaction may or may not have been processed depending on your overdraft settings.
⚠ Watch out:Yes — NSF fees ($25–$35 each) add up. If frequent, review automatic payments and consider overdraft protection.
e.g. NSF FEE / RETURNED ITEM FEE
Overdraft. Your bank covered a transaction even though your balance went negative, and charged a fee for doing so. Different from NSF — with overdraft protection, the transaction went through; with NSF, it was declined.
⚠ Watch out:Yes — review spending and automatic payments. Some banks now offer overdraft programs with no fees.
e.g. OVERDRAFT FEE / OD FEE
DDA DEBIT
Account type indicatorDemand Deposit Account. A DDA is simply a checking account — a bank account where funds are available on demand. DDA DEBIT just means a debit transaction from your checking account. Not a separate charge type.
✓ No concern:None — it's just labeling the account type.
e.g. DDA DEBIT TRANSFER
MEMO POST
Pending transactionA transaction that has been authorized but not yet fully settled. It appears on your statement as a placeholder while the merchant finalizes the charge. Memo posts typically settle within 1–3 business days.
✓ No concern:None — it will become a posted transaction shortly.
e.g. MEMO POST PENDING AMAZON
WIRE IN / WIRE OUT
Transfer typeA wire transfer — an electronic transfer sent directly between banks, typically same day. WIRE IN means you received funds; WIRE OUT means you sent them. Wire transfers are faster but more expensive than ACH ($15–$50 per transfer).
⚠ Watch out:Verify wire outs — wire fraud is irreversible once sent. Never wire money based on unsolicited requests.
e.g. WIRE IN CHASE BANK / WIRE OUT INTERNATIONAL
Interest earned on your savings, money market, or CD account, credited to your account. For most checking accounts this will be $0 or near-zero. High-yield savings accounts may show meaningful interest credits monthly.
✓ No concern:None — this is money coming in. Note: bank interest is taxable income, reported on Form 1099-INT.
e.g. INTEREST PAID / DIVIDEND PAID
SERVICE CHARGE / MAINTENANCE FEE
FeeA monthly fee charged by the bank for maintaining your account. Many banks waive it if you maintain a minimum balance or receive qualifying direct deposits. If you're being charged, check your account's waiver conditions.
⚠ Watch out:Worth reviewing — most banks will waive this if you meet simple conditions.
e.g. MONTHLY SERVICE FEE $12.00
ZELLE PAYMENT
P2P transferA peer-to-peer payment sent or received via Zelle, built into most major bank apps. ZELLE PAYMENT SENT means you sent money; ZELLE PAYMENT RECEIVED or similar means you got it.
⚠ Watch out:Zelle payments are instant and generally irreversible. Never send Zelle to someone you don't personally know.
e.g. ZELLE PAYMENT SENT JOHN DOE
RECURRING TRANSFER
Scheduled transferAn automated transfer you set up between accounts or to a savings account on a schedule — weekly, biweekly, or monthly. If you don't recognize it, you may have a forgotten automatic savings or investment transfer.
⚠ Watch out:Review your scheduled transfers if unrecognized. Log into online banking → Transfers → Scheduled.
e.g. RECURRING TRANSFER TO SAVINGS $200
FOREIGN TRANSACTION FEE
FeeA fee (typically 1–3% of the transaction amount) charged when you use your debit card outside the US or with a foreign merchant. Appears alongside the original transaction.
⚠ Watch out:Minor but cumulative. Look for a debit card or checking account with no foreign transaction fees if you travel frequently.
e.g. FOREIGN TRANSACTION FEE $3.42
What is VIOC on a bank statement?
VIOC stands for Valvoline Instant Oil Change, so the charge came from a Valvoline service center — it is not fraud. The digits after the hash are the store number and the town beside them is that store's location, as in VIOC #1234 CHICAGO IL. Because service-station charges are authorized on the day and settle two to three days later, the date on your statement can sit a few days after the visit. If nobody on the account has been to a Valvoline, check the store town against where you live before disputing it.
Is a VIOC charge on my credit card fraud?
Almost never. A card being tested by a stranger is used online or at a large retailer, not at a physical oil-change bay, so a VIOC line usually traces to someone on the account — a partner, an adult child, or a company car serviced on a shared card. Match the store number and town on the charge to a Valvoline near you, then check the amount against a typical oil change, tire rotation, or fluid top-up before you report it.
What does EDI payment mean on a bank statement?
EDI stands for Electronic Data Interchange — a standardized electronic payment format used between businesses. An EDI PAYMENT on your statement means you received or sent a business payment through the EDI network. It's commonly used by companies to pay vendors, contractors, and suppliers. It's a legitimate payment type, not a charge to worry about.
What does counter credit mean on a bank statement?
Counter credit means a deposit made in person at a bank teller window — "over the counter." It simply labels the deposit as having been made by a person at the branch, as opposed to an ATM deposit, mobile deposit, or direct transfer. It's a normal deposit. For a full breakdown with examples from Chase, BofA, and Wells Fargo, see our dedicated guide to counter credit on bank statements.
What does reversal mean on a bank statement?
A reversal on a bank statement means a transaction was undone. This could be a merchant refund processed at the payment network level, a bank error correction, or a duplicate charge being removed. A reversal credits money back to your account. If you see a reversal you don't expect, verify the original transaction was handled correctly.
What does preauth mean on a bank statement?
PREAUTH (pre-authorization) is a temporary hold placed on funds by a merchant before the final charge settles. Gas stations routinely hold $1–$125 when you swipe your card before pumping. Hotels hold a deposit at check-in. These holds are not final charges — they disappear and are replaced by the actual charge within 1–5 business days.
