What Is a Check? How Bank Checks Work and How to Write One

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A check is a written, dated and signed instruction that tells a bank to pay a specific amount of money from the writer’s account to a named person or business. Three parties are involved. The payor (also called the drawer or maker) is the person who writes the check, the payee is the person or entity who receives the money, and the drawee is the bank that holds the payor’s account and makes the payment. Outside the United States the same instrument is usually spelled “cheque,” and it works the same way.

A check is not money in itself. Its value depends entirely on whether the payor’s account holds the funds when the check is presented.

How a Check Works

Banks issue checks mainly on checking accounts, though some savings and other accounts allow them. A check moves from writing to final payment in five steps:

1. The payor writes and signs the check and gives it to the payee.
2. The payee endorses it by signing the back, then cashes or deposits it at their own bank, through a branch, an ATM or a mobile deposit app.
3. The payee’s bank sends the check for clearing. It stamps the item and forwards it, today almost always as a digital image, to the payor’s bank.
4. The payor’s bank verifies and pays. It confirms the account has enough funds and the check looks genuine, then debits the payor’s account and settles with the payee’s bank.
5. The check is filed. The paying bank records the item, and the payor can usually see an image of the cleared check in online banking or on a statement.

In the U.S., the Check Clearing for the 21st Century Act (Check 21), effective 2004, lets banks exchange electronic images instead of shipping paper, which is why a check can be deposited with a phone photo.

Because the check names a specific payee, it is generally safer to carry or mail than cash, especially for large sums. A lost check made out to someone else cannot simply be spent by whoever finds it, although stolen and altered checks remain a real fraud risk.

Interpreting a Check

Checks vary in design, but U.S. personal checks share the same layout:

• Top left: the payor’s name and usually an address.
• Top right: the check number and the date line.
• Center: the “Pay to the Order of” line for the payee’s name, with a small box beside it for the amount in numerals.
• Below the payee line: a long line for the amount written in words, ending in “Dollars.”
• Bank name: printed on the face, identifying the drawee.
• Bottom left: the memo line, for notes such as an invoice or account number.
• Bottom right: the signature line. A check is not valid without the payor’s signature.
• Bottom edge: a line of magnetic ink characters (the MICR line) containing three numbers.

The MICR line reads, from left to right on most U.S. checks:

• Routing number: nine digits identifying the bank.
• Account number: the payor’s specific account.
• Check number: matching the number printed in the top right corner.

The back of the check has an endorsement area. The payee signs here to cash or deposit it, and the banks add their own stamps as the item moves through clearing.

How to Write a Check

1. Date it on the line in the top right.
2. Name the payee in full on the “Pay to the Order of” line.
3. Enter the amount in numbers close to the dollar sign, so nothing can be added in front.
4. Write the amount in words, showing cents as a fraction over 100, then draw a line through the remaining space.
5. Add a memo (optional) noting what the payment is for.
6. Sign it with the signature your bank has on file.

Example of a Check

Hypothetical example. Maria owes $1,245.50 in rent to Northside Property Management. She fills in her check as follows:

• Date: the day she hands it over
• Pay to the Order of: Northside Property Management
• Amount box: 1,245.50
• Amount line: One thousand two hundred forty-five and 50/100 ________ Dollars
• Memo: Unit 4B rent
• Signature: Maria’s usual signature

If the figure in the box and the words ever disagree, the written words generally control under U.S. commercial law, which is one reason to write both carefully. The line drawn after “50/100” stops anyone from adding words to raise the amount.

When the property manager deposits the check, it signs the back. A restrictive endorsement such as “For deposit only” followed by a signature limits the check to deposit into the payee’s account, so a lost endorsed check cannot be cashed. A blank endorsement (signature only) makes the check payable to whoever holds it, which is riskier.

Types of Checks

Certified Check

A certified check is a personal check that the payor’s bank has verified and guaranteed. The bank confirms the signature, sets aside the funds from the account and marks the check as certified, so it cannot bounce for lack of funds.

Cashier’s Check

A cashier’s check is drawn on the bank’s own funds and signed by a bank officer, so the bank, not the individual, is responsible for paying it. The customer pays the bank the amount up front, usually plus a fee. Sellers often require cashier’s checks for large purchases such as a car, or for the funds due at closing on a mortgage, because the risk of nonpayment shifts from a person to a bank.

Payroll Check

A payroll check, or paycheck, is issued by an employer to pay an employee for work. Most employers now use direct deposit or other electronic transfers instead.

Certified vs. Cashier’s Check

Both carry a bank guarantee and are considered more secure than personal checks. A certified check is signed by the account holder and drawn on their own account. A cashier’s check is signed by the bank and drawn on the bank’s account. A money order is a related prepaid instrument, sold by banks, the post office and retailers, typically for smaller amounts.

Bounced Checks and Fees

A check bounces when it is written for more than the account holds and the bank refuses to pay it, which banks call non-sufficient funds (NSF) or insufficient funds.

A bounced check usually costs the payor an NSF or returned-item fee. If the bank chooses to pay the check anyway, the account goes negative and the payor may be charged an overdraft fee instead. The payee can be charged too: a returned deposit item fee applies when someone deposits a check that later bounces, and any money the bank had already made available is reversed. Policies differ by bank. Some offer a grace period, for example 24 hours, to bring the balance back up before fees apply.

Funds Availability and Holds

A deposited check is not the same as cleared funds. U.S. banks follow Regulation CC, which sets maximum hold times. Funds from cashier’s, certified and government checks generally must be available by the next business day under the rule’s conditions. Banks may hold the excess of deposits above an inflation-adjusted threshold set in the regulation, or the entire check if they have reasonable cause to doubt it will be paid.

This matters because “available” and “final” are different. Fake cashier’s checks are a common tool in overpayment scams: the victim deposits the check, sees the funds become available, sends money back, and is then left owing the bank when the check is returned as counterfeit days later.

Why Checks Are Still Used

Cards, wire and ACH transfers and apps such as Venmo or PayPal have long overtaken checks for everyday purchases. Checks persist where a paper record and a named payee help: rent to landlords who do not take cards, business-to-business invoices, security deposits, gifts, government payments and large purchases that require a cashier’s check. A cleared check also proves payment, since the paying bank keeps an image showing the endorsement.

A check deposit moves funds between accounts, but banks treat it as a separate instrument from an electronic transfer, with its own clearing route and hold rules.

Limitations of a Check

• Speed: checks take time to clear, and funds can be held for several business days.
• Fraud exposure: checks reveal the payor’s routing and account numbers, and paper checks can be stolen from mail and altered (“check washing”).
• Bounce risk: a personal check carries no guarantee, so the payee bears the risk until it clears.
• Cost: printed checks, postage and bank fees add up compared with free electronic transfers.
• Expiry in practice: under the Uniform Commercial Code, a bank is not obligated to pay an ordinary check presented more than six months after its date, though it may choose to. Some checks also state their own deadline, such as “void after 90 days.”

A payor who loses a check or changes their mind can ask the bank for a stop payment, usually for a fee, as long as the check has not already been paid. A check that will not be used, for example one handed over to set up direct deposit, should be marked “VOID” across the front so it cannot be filled in.

FAQs

The Bottom Line

Anyone paying rent, settling invoices or making a large purchase may still need checks. Write both amounts carefully, endorse deposits restrictively, and mark unused checks VOID. Funds that show as available can still be reversed if a check bounces or proves counterfeit, so wait for a check to clear before sending money back to anyone.