You've got a blank money order in front of you. Five fields, no instructions, and a nagging suspicion that writing the wrong thing in any of them will mean starting over. You're right about that last part. Money orders can't be edited once they're filled in, so getting them right the first time matters.
To fill out a money order: write the recipient's full name in the "Pay to the Order of" field, your name and address in the purchaser section, and sign the front. Leave the back blank until you cash or deposit it. Fill in the memo line with the payment reference. Don't leave any fields blank.
That's the short version. Below, we'll walk through each field with examples, point out the mistakes that get money orders rejected, and cover where to cash one when you're on the receiving end.
What you need before you fill out a money order
Before you pick up a pen, make sure you have three things ready. Once you start writing on a money order, you can't undo it. A mistake means requesting a refund from the issuer (USPS, Western Union, or MoneyGram) and buying a new one, which costs both time and money.
- The recipient's full legal name. This is the name that appears on their government-issued ID or bank account. Not a nickname, not a business abbreviation, not "Mom." If the name on the money order doesn't match the name on the recipient's ID, they won't be able to cash it. If you're paying a company, use the company's full legal name, not the brand name (for example, "Acme Property Management LLC", not "Acme Rentals").
- Your address. The purchaser section requires your name and address. This is your current mailing address. If there's ever a problem with the money order (it gets lost, the recipient disputes it), the issuer uses this information to contact you.
- A payment reference or memo. This isn't always required, but it's always smart. Write whatever helps the recipient match this payment to what it's for: a rent invoice number, a utility account number, a case reference, or simply "March rent." If the money order gets separated from any accompanying paperwork, the memo is how the recipient knows what it was for.
One more thing: use a pen, never a pencil. A pencil can be erased and altered, which is why some institutions reject money orders filled out in pencil.
How to fill out a money order: Field by field
Every money order looks slightly different depending on the issuer (USPS, Western Union, MoneyGram), but they all have the same five fields. Here's how to write a money order, field by field, with a worked example for each.
Step 1: "Pay to the Order of" (or "Pay to")
This is the most important field. Write the full legal name of the person or company you're paying. Use their name exactly as it appears on their ID or business registration.
Example: If you're paying rent to Acme Property Management LLC, write "Acme Property Management LLC." Don't write "Acme Properties" or "My landlord."
Fill this in immediately after purchasing the money order. If you leave it blank and lose the money order, anyone who finds it can write in their own name and cash it. A blank "Pay to" field turns the money order into cash.
Step 2: "Purchaser" or "From" (your name and address)
Write your full legal name and current mailing address. This identifies you as the sender. Some money orders label this field "Purchaser," others say "From," and some say "Sender." They all mean the same thing.
Example: "Jane Smith, 742 Elm Street, Apt 4B, Chicago, IL 60614."
If you're sending the money order on behalf of someone else, write the name of the person who actually purchased it (the person who paid for it at the counter), not the person who asked you to buy it.
Step 3: "Memo" or "For" (payment reference)
Write a brief description of what this payment is for. This field isn't always required, but leaving it blank means the recipient has to guess why they received money, which can delay processing.
Example: "Invoice #4521" or "March 2026 rent, Unit 4B" or "Account #78901234."
Keep it short. One line. If the reference is a long account number, double-check every digit. A wrong account number on the memo won't cause the money order to bounce, but it can cause the payment to be applied to the wrong account on the recipient's end.
Step 4: Sign the front
Sign on the front of the money order in the "Purchaser's Signature" or "Drawer" line. This is your signature as the buyer and sender of the money order. Don't confuse this with the back.
The back of the money order has an endorsement line. That's for the recipient to sign when they cash or deposit it. If you sign the back, some banks will treat it as if you've already endorsed it and may reject it when the recipient tries to cash it.
Step 5: Keep your receipt
Most money orders come with a detachable receipt or stub. Tear it off and keep it somewhere safe. This receipt contains the money order's serial number and tracking information. If the money order is lost, stolen, or never cashed, you'll need this receipt to request a refund or replacement. Without it, proving you purchased the money order is much harder.
That's it. Five fields, five minutes, done. Don't leave any field blank. A fully completed money order is harder to alter or misuse than one with empty fields.
Common money order mistakes and how to avoid them
Money orders aren't forgiving. Once you've written on one, it's done. Here are the mistakes that get money orders rejected at the counter:
Mistake: Writing a nickname instead of a full legal name.
Why it matters: the recipient's bank or cashing location matches the name on the money order against their government-issued ID. "Mike" won't match "Michael David Johnson." "Bob's Auto Shop" won't match "Robert's Automotive Services LLC."
Fix: Ask the recipient for their full legal name (or business name) before you start writing. If you're not sure, ask to see their ID or check the exact name on their invoice.
Mistake: Leaving the "Pay to the Order of" field blank.
Why it matters: A money order with a blank payee field is a bearer instrument. Anyone who has it can write in their own name and cash it. It's the equivalent of carrying cash with no security.
Fix: Fill in the payee name immediately after purchasing. Don't wait until you get home. Do it at the counter.
Mistake: Trying to alter the amount.
Why it matters: The amount is printed by the issuing machine at the time of purchase. You can't change it. If you bought a money order for $500 but need to send $450, you can't cross out the amount and write a new one. The money order will be rejected.
Fix: know the exact amount before you buy. If you make a mistake, you'll need to request a refund from the issuer and purchase a new money order. USPS charges a fee for refund processing.
Mistake: Signing the back instead of the front.
Why it matters: the back is for the recipient's endorsement. If you, the purchaser, sign the back, some institutions treat it as if the money order has already been endorsed and will reject it when the actual recipient tries to cash it.
Fix: Sign the front only, in the "Purchaser's Signature" field. Leave the back completely blank.
Mistake: Using a pencil.
Why it matters: A pencil can be erased and altered. Some banks and cashing locations reject money orders filled out in pencil as a fraud prevention measure.
Fix: Use a black or blue ballpoint pen. Not a felt-tip, not a gel pen (smudges), not a pencil.
Where to cash or deposit a money order
If you've received a money order, you need to endorse it (sign the back), present a government-issued photo ID, and take it to one of these locations:
Your bank or credit union. If you have a bank account, depositing a money order is usually free. You can deposit it at the teller, through the ATM (if your bank accepts money order deposits), or via mobile deposit (if your bank's app supports it). Funds are typically available within 1 to 2 business days.
US Post Office. USPS money orders can be cashed at any post office. You'll need a valid photo ID. There's no fee for cashing a USPS money order at a post office.
Check-cashing stores. These accept money orders but charge a fee, typically 1 to 3% of the money order's value. On a $1,000 money order, that's $10 to $30. Use this option only if you don't have a bank account and can't get to a post office.
Walmart Money Centre. Walmart cashes money orders up to $5,000 for a fee (typically $4 to $8). Limits and fees vary by location. You'll need a valid photo ID.
Western Union and MoneyGram locations. If the money order was issued by Western Union or MoneyGram, you can cash it at their partner locations. Fees apply.
What if the money order is lost or stolen? Contact the issuer immediately with the serial number from your receipt. USPS charges a $6.45 processing fee for lost money order inquiries. Western Union and MoneyGram have their own processes and fees. Replacement can take 30 to 60 days.
Money order alternatives for sending money without a bank
Money orders exist because not everyone has a bank account, and not every payment can be made electronically. But if you're using money orders regularly because you don't have access to digital payments, there are faster and cheaper options:
Digital wallets like PayPal, Cash App, and Venmo let you send money from your phone. No bank account required for basic features. For international payments, Grey lets you open an account to receive money in USD, GBP, or EUR and use a virtual debit card for spending. No US address, no bank relationship, no queueing at the post office.
If you're sending money to someone abroad, a money order is one of the slowest and most expensive options. International money orders through USPS cost $10.25 each (as of mid-2026) and take days to arrive. Compare that with digital transfer services that deliver in minutes for a fraction of the cost. For the full comparison, see ACH vs wire transfer for bank payments.
Money orders still make sense for specific situations: paying rent to a landlord who only accepts them, making payments to government agencies, or sending money to someone without internet access. For everything else, there's a cheaper and faster option. See Grey for freelancers or send money from the US for digital alternatives.
Frequently asked questions about how to fill out a money order
Do you sign the back of a money order?
Only if you're the recipient cashing or depositing it. The back is for the recipient's endorsement signature. If you're the purchaser (the person sending the money order), you sign the front in the "Purchaser's Signature" field. Signing the back as the purchaser can cause the money order to be rejected when the recipient tries to cash it.
What happens if I make a mistake on a money order?
You can't correct it. Money orders can't be altered after they're filled in. Cross-outs, white-out, and overwriting will cause the money order to be rejected. If you make a mistake, you'll need to request a refund from the issuer (USPS, Western Union, or MoneyGram), which involves a processing fee and a waiting period, and then buy a new one.
Can I fill out a money order in pencil?
Technically, yes, but many banks and cashing locations will reject it. A pencil can be erased and altered, which makes it a fraud risk. Always use a black or blue ballpoint pen.
How do I cancel a money order?
Contact the issuer with the serial number from your receipt. For USPS money orders, fill out PS Form 6401 (available at any post office) and pay a $6.45 processing fee. The refund can take 30 to 60 days. Western Union and MoneyGram have their own cancellation processes. If the money order has already been cashed, it can't be cancelled.
What do I put in the memo line of a money order?
A brief reference that helps the recipient identify the payment: an invoice number, account number, rental unit number, or a description like "March rent" or "Tuition payment." This field isn't always required, but leaving it blank can delay processing if the recipient handles many incoming payments.
How long is a money order valid?
USPS money orders don't expire and can be cashed at any time. However, some states impose abandoned property rules that may affect uncashed money orders after a certain period (often 1 to 5 years). Western Union and MoneyGram money orders may have expiration dates or begin charging inactivity fees after 1 to 3 years. Check the fine print on the money order itself or contact the issuer.
Open a Grey account and send or receive money internationally without queueing for a money order. Faster, cheaper, fully digital.
Disclaimer: This article is for informational purposes only. Money order procedures, fees, and acceptance policies vary by issuer and location. Verify current requirements with the specific issuer (USPS, Western Union, MoneyGram) before purchasing or cashing a money order. Grey is not a bank. Grey is a licensed financial services provider offering multi-currency accounts.