A money order is a prepaid payment instrument that orders its issuer to pay a fixed sum to a named payee. The buyer hands over the face amount plus a fee, usually in cash or by debit card, and receives a paper slip that works much like a check but cannot bounce for lack of funds, because the money has already been paid. Money orders are sold by post offices, banks and retail agents of money transmitters, and are widely used by people who have no checking account or who do not want to share their account details.
In the United States the best-known issuer is the US Postal Service, alongside private issuers such as Western Union and MoneyGram (named here only as examples). Money orders sit between a personal check and a cashier's check: they are prepaid like the latter but are capped at small amounts. In the UK the counterpart is the postal order, and in parts of South Asia the post office "money order" is a domestic cash transfer delivered by the postal service.
Money order in plain terms
A money order is like buying a voucher for an exact amount with a name already written on it. You pay the shop or post office now, and they give you a piece of paper that only the person you named can turn back into money.
Because you paid up front, the person receiving it does not need to trust your bank balance, only the issuer. And because the voucher is for a fixed amount, nobody can quietly add a zero. It is a simple way to pay a landlord, a court or a utility when you do not have a bank account or do not want to post a personal check.
How money orders work
The buyer chooses the amount, pays it with the fee, and receives the order with the amount printed by the issuer. The buyer fills in the payee's name and their own name and address, and keeps the receipt, which carries the serial number. The payee then deposits or cashes the order at a bank, at a check casher or with the issuer. Once deposited, it travels through check clearing back to the issuer, which pays from the prepaid funds.
Issuers profit from the fee and, before the order is cashed, from the float: the buyer's money sits with the issuer until the payee presents the order, sometimes for weeks. Orders that are never cashed become unclaimed property after the period set by state law.
US Postal Service money orders
The US Post Office Department began issuing domestic money orders on 1 November 1864 under an act of Congress passed in May that year, and added international money orders in 1869. As of November 2026, the Postal Service's own price list shows:
- A maximum of $1,000 for a single domestic money order; buyers who need more purchase several.
- A fee of $2.65 for orders up to $500 and $3.75 for orders from $500.01 to $1,000.
- Free cashing at a post office for the payee, who signs in front of a clerk and shows photo ID.
- No stop-payment option; a lost or stolen order can be replaced for a $23 processing fee after an inquiry that can take up to 60 days.
Private issuers set their own limits and fees, which are often lower per order but vary by retailer. Some banks sell money orders only to their own customers.
Regulation and anti-money-laundering rules
Under US federal rules, a business that issues or sells money orders in amounts greater than $1,000 to any person on any day is a money services business and must complete FinCEN registration (unless it is only an agent), run an AML program and file reports. Sellers that take $3,000 to $10,000 in currency for money orders must record the buyer's identity, the serial numbers and the amounts and keep the records for five years (31 CFR 1010.415), one of the core recordkeeping requirements of the Bank Secrecy Act. Cash purchases above $10,000 in a day trigger a currency transaction report, and buying several orders just under these thresholds to dodge them is structuring, which sellers watch for and report on a suspicious activity report. Most US states also require money order issuers to hold a money transmitter license.
In the UK, postal orders were first sold on 1 January 1881. As of 2026 the Post Office sells them for up to £250 each, and they expire six months after issue.
Uses, risks and decline
Money orders remain common for rent, court fines, government fees and payments by people without bank accounts, which gives them a role in financial inclusion. They are also a target for fraud. Counterfeit money orders appear in overpayment schemes in which a stranger sends an order for too much and asks for the difference back; the bank may make the funds available before the fake is discovered, leaving the depositor liable. Genuine orders can also be stolen and their payee names altered. Payees can verify an order with the issuer before handing over goods, and buyers should keep their receipts.
Electronic alternatives have taken much of the market. Prepaid cards, digital wallets, instant peer-to-peer apps and domestic money transfers move money faster and can be tracked. For sending money abroad, remittances through licensed providers have replaced the international money order in most corridors.