Money Order Definition: How to Buy, Fill Out, and Cash One

A money order is a prepaid payment instrument you buy from a post office, bank, or retailer for its full face value plus a small fee, then fill out with the recipient’s name so they can cash or deposit it like a check. Because you’ve already paid the issuer, the money is guaranteed, and the money order can’t bounce. Fees at the most common sellers run between $1 and $3.60, and a single USPS money order maxes out at $1,000 in face value.1USPS. Money Orders

Money orders are useful when you need to pay someone who won’t take a personal check, when you don’t have a bank account, or when you want proof of payment with a serial number you can look up. Rent, utility bills, and payments to individuals are the typical uses.

Where to Buy One and What You’ll Pay

You can buy money orders at post offices, banks, credit unions, Walmart, and many convenience stores and grocery chains. Fees stay low:

  • USPS charges $2.55 for amounts up to $500 and $3.60 for $500.01 to $1,000. Military postal money orders cost $0.84.1USPS. Money Orders
  • Walmart caps the fee at $1 per money order, with exact charges varying by location.2Walmart. Money Orders
  • Banks and credit unions typically charge $2 to $5, and some waive the fee for account holders.

Pay with cash or a debit card. If you use a credit card, most sellers either refuse the transaction or process it as a cash advance, which carries a higher interest rate, starts accruing interest immediately, and usually adds a fee of 3% to 5% on top.

The USPS cap of $1,000 per domestic money order is a hard ceiling. To send more, you buy multiple instruments and pay the fee on each. There’s no limit on how many you can buy in a day, but once you cross certain dollar thresholds the paperwork changes (see below).

One boundary worth noting: the USPS stopped selling international postal money orders in October 2024, and foreign postal operators stopped cashing U.S.-issued ones on October 1, 2025.3USPS About. IMM Revision: Elimination of International Postal Money Order Service For money going abroad you’ll need a wire transfer, international bank transfer, or remittance service.

How to Fill Out a Money Order

Fill it out before you leave the counter. A blank money order is essentially cash, and anyone who finds it can write in their own name.

  • Write the recipient’s full name or business name on the “Pay to the Order of” line in pen.
  • Fill in your name and address in the “Purchaser,” “Sender,” or “From” field.
  • Sign the front where it says “Purchaser’s signature.” Do not sign the back. That space is for the recipient to endorse when they cash it.
  • Detach and keep the receipt stub. It carries the serial number, post office number, and issued amount.

The receipt is the only proof you bought the money order. Without it you can’t check whether it was cashed, request a replacement, or file for a refund.4USPS. Money Orders – The Basics Keep it until you’ve confirmed the recipient has the money.

You generally cannot stop payment on a money order once it’s issued. The USPS states plainly that there are no stop payments on postal money orders and that you can’t track one in the mail.4USPS. Money Orders – The Basics That’s why filling in the payee immediately matters so much.

How the Recipient Cashes or Deposits It

Cashing at the issuer is the fastest and cheapest option. Any post office will cash a USPS money order for free with a valid government photo ID. Sign the back in front of the postal employee, not beforehand.4USPS. Money Orders – The Basics

Depositing works like depositing a check. Endorse the back by signing your name exactly as it appears on the “Pay to” line, then deposit at a teller window, ATM, or by mobile deposit if your bank allows it. Under federal Regulation CC, a USPS money order deposited in person to a bank employee has to be made available by the next business day.5eCFR. Part 229 – Availability of Funds and Collection of Checks (Regulation CC) Other money orders follow the standard check-hold schedule, and banks can extend holds in specific situations such as deposits above $6,725 or reasonable doubts about an item’s validity.6Federal Reserve. A Guide to Regulation CC Compliance

If It’s Lost or Stolen

Take your receipt to any post office and ask to start a Money Order Inquiry. Confirming that the money order is lost or stolen can take up to 30 days, and the full investigation can run up to 60 days. The USPS charges a $21 processing fee for a replacement.1USPS. Money Orders

If someone other than the intended recipient cashed it, you have one year from the date of payment to file a claim for improper payment. After that year, you lose the right to a refund.4USPS. Money Orders – The Basics All of this depends on having the receipt. Without the serial number, post office number, and issued amount, the USPS cannot look up your money order at all.

Do Money Orders Expire?

It depends on who issued it.

  • USPS money orders never expire. You can cash one years after purchase for the full face value.1USPS. Money Orders
  • Western Union money orders are subject to a non-refundable service charge if not cashed within one year of purchase, or three years in California.7Western Union. Retail Money Order Terms and Conditions
  • MoneyGram money orders don’t technically expire, but a monthly service charge begins after one year and gradually reduces the face value. The amount is printed on the back of the instrument.8MoneyGram. Help for MoneyGram Money Orders

Cash money orders promptly. With private issuers, dormancy fees can quietly eat into the value month after month.

Spotting a Counterfeit

Counterfeit money orders drive several common scams. The most frequent is the overpayment scheme: a buyer sends a money order for more than the agreed price and asks you to wire back the difference. The money order turns out to be fake, your bank reverses the deposit, and you’re liable for the full amount even if you already sent the “refund.”9Consumer Financial Protection Bureau. Someone Bought Something I Was Selling Online and Sent Me a Check or Money Order for More Than the Price of the Item

Before depositing a USPS money order, check its physical security features:

  • Watermark. Hold it up to a light. Legitimate postal money orders show a watermark of either Benjamin Franklin repeating down the left side or a Pony Express rider on newer versions issued in 2025. If the watermark is clearly visible without holding it to light, that points to a fake.
  • Security thread. A dark vertical line runs top to bottom and is visible when backlit, with the letters “USPS” repeating along it.
  • Printed amounts. Look for discoloration, smudging, or signs of alteration around the dollar figures. Fraudsters sometimes wash and reprint amounts on stolen money orders.10United States Postal Inspection Service. How to Spot a Fake

You can also verify any USPS money order at USPS.com by entering the serial number, post office number, and dollar amount.4USPS. Money Orders – The Basics If anyone asks you to deposit a money order and immediately send money back by any method, assume it’s a scam.

Money Order vs. Cashier’s Check

Both guarantee payment, but they fit different situations.

  • Amount. A money order maxes out at $1,000 per instrument. A cashier’s check has no standard cap and routinely covers transactions in the tens of thousands.4USPS. Money Orders – The Basics
  • Cost. Money orders run $1 to $3.60. Cashier’s checks typically cost $5 to $15, though some banks waive the fee for account holders.
  • Where to get one. Money orders are sold at post offices, Walmart, and convenience stores without a bank account. Cashier’s checks are available only through banks and credit unions.
  • Best use. Money orders fit rent, utility bills, and moderate payments to individuals. Cashier’s checks are standard for real estate closings, vehicle purchases, and any guaranteed payment above $1,000.

Reporting Rules for Large Purchases

Money order purchases trigger federal reporting at certain dollar amounts regardless of where you buy them, and the rules apply even when the funds are entirely legitimate.

If you buy $3,000 or more in money orders in a single day at the USPS, across all visits to all locations that day, you must complete PS Form 8105-A and show valid ID.4USPS. Money Orders – The Basics The same $3,000 threshold applies at other money services businesses under the Bank Secrecy Act. The seller verifies your identity, records the transaction details including serial numbers, and keeps those records for five years.11Financial Crimes Enforcement Network. A Quick Reference Guide for Money Services Businesses

At $10,000, requirements escalate. Any business that receives more than $10,000 in cash or cash equivalents like money orders in a single transaction or related transactions must file IRS Form 8300 within 15 days.12Internal Revenue Service. Form 8300 and Reporting Cash Payments of Over $10,000

Deliberately splitting purchases across visits or locations to stay below these thresholds, known as “structuring,” is itself a federal crime even when the underlying money is lawful. Don’t break up transactions to avoid paperwork.