Properly writing an address means putting each part on its own line in the order carriers read it: name, street, city line, then country when needed.
If you’ve ever asked how to properly write an address, you’re not alone. Most delivery problems come from slips: a missing unit, a wrong postal code, or a street line that’s squeezed into a messy block. A clean layout gives the carrier a clear path from country to door.
Use this page when you’re addressing an envelope, printing a label, or typing a form. You’ll get the line order, placement, and common traps that cause delays.
Parts Of A Mailing Address
- Recipient name (person, business, or both)
- Street line (number + street name + street type)
- Unit line (Apt, Unit, Ste, Floor) when the building has units
- City line (city + region code + postal code, in your country’s order)
- Country line (only for cross border mail)
| Use Case | Lines To Use | Slip That Often Causes Delay |
|---|---|---|
| Home letter | Name → Street → City line | Unit left off |
| Home package | Name → Street → Unit → City line | Unit buried in notes |
| Business delivery | Person → Business → Street → City line | Business name skipped |
| Apartment building | Name → Street → Apt/Unit → City line | Apt placed on city line |
| PO Box | Name → PO Box + number → City line | Street line added when not used |
| Rural route | Name → Route info → Box number → City line | Street name guessed |
| Military mail | Name → Unit/Box → APO/FPO/DPO line → ZIP | Country name added |
| Campus mail | Name → Dorm + room/box → City line | Room or box missing |
| Cross border mail | Name → Street → Locality line → COUNTRY | Using sender’s format |
How To Properly Write An Address
A delivery address works best when each line has one job. Think bottom up. The last line is the country when you’re mailing abroad. The line above it is the city line, which includes the postal code. Above that sits the street line. At the top sits the recipient.
Line 1: Recipient Name
Write the name that matches the mailbox, door label, or business sign. If you’re sending to a business, place the business name on its own line. Put a person’s name above it when you have one.
Skip long honorific stacks. A short title is fine, yet long role strings can crowd the line.
If a business asks for an attention line, place it right under the person or business name: “Attn Shipping” or “Attn Billing.” Keep it short so it doesn’t steal space from the street and city lines.
Line 2: Street Number And Street Name
Start with the building number, then the street name, then the street type (St, Ave, Rd). Keep directionals with the street line: “N Main St” stays together.
If the address uses a building name, keep it with the recipient line or place it above the street line. Don’t replace the street line with a building name unless the recipient tells you their mail is routed that way.
Line 3: Unit, Suite, Floor, Or Room
When the destination has units, the unit number is part of the delivery address. Put it right after the street line or on its own line under the street. Keep the label and number together: “Apt 4B,” “Unit 12,” “Ste 210.”
If you must fit it on one line, keep it at the end of the street line and trim other words first. Don’t move unit info to the city line.
Line 4: City, Region, And Postal Code
Use the city name the recipient uses. Add the region code when your country uses one, then add the postal code in the standard order. Keep the postal code on the same line as the city so it routes cleanly.
In the United States, the city line is commonly written as “City ST ZIP.” If you’re unsure about abbreviations, state codes, or how USPS formats address elements, USPS Publication 28 is the clearest public reference.
Where To Put The Return Address
Put the sender’s address in the top left corner. Use the same line order as the delivery address, just in smaller text. Keep it out of the stamp area so postage markings don’t overlap it.
Properly Writing An Address For Mail Delivery Without Delays
Carriers and sorting systems rely on patterns. When your label matches, mail moves with fewer manual stops. These habits help.
Use Plain Punctuation
Most mailing addresses work fine with no commas. Extra punctuation adds noise and can reduce legibility. Stick to spaces and line breaks.
Mailing to the UK? Royal Mail guidance on how to address mail shows line order and postcode placement.
Keep Numbers Easy To Read
If you handwrite, use clear block letters and leave space between characters. Watch common swaps like 0/O and 1/I. If your handwriting varies day to day, print the label.
Match Postal Code To The City
Postal codes route mail faster than city names. A wrong code can send a piece to the wrong sorting area. Before you seal the envelope, double check the code against the recipient’s city and region.
Don’t Mix Delivery Notes Into The Address
Gate codes, “leave at back door,” and delivery timing belong in a carrier’s instruction field, not in the address block. Notes inside the address block can be read as part of the street line.
Placement On Envelopes And Shipping Labels
You can write the right words and still lose clarity if placement is off. Keep the delivery address in the center area with clean margins so stamps, barcodes, and tape don’t collide with the text.
Delivery Address Placement
- Place it near the center, slightly right on standard envelopes.
- Leave clear space around the block so it stands alone.
- Avoid seams, folds, and glossy tape over the text.
Return Address Placement
- Top left corner is the standard spot.
- Use the same line order as the recipient block.
- Keep it smaller than the recipient block.
Special Formats That Trip People Up
Some destinations don’t use a normal street address. Treat these as their own formats and copy the recipient’s wording exactly.
PO Box
Write “PO Box” and the number on the street line. Don’t add a street address unless the recipient gives a specific instruction that the post office requires.
Rural Route And Highway Contract
Rural delivery often uses route identifiers and box numbers. Keep the route info and box number together. If the recipient gives both a physical address and a route address, ask which one their carrier uses for delivery.
Military Mail
Military addresses use an APO, FPO, or DPO “city” line plus a region code like AE, AA, or AP and a ZIP. Keep the unit and box line exactly as given. Don’t add a country name on the last line.
Care Of
When mail is delivered to a host, place “c/o Host Name” on the line above the street line. Keep the recipient name on Line 1 so the host knows who the piece is for.
Typing An Address In Online Forms
Most checkout forms split the street into “Address 1” and “Address 2.” Put the street number and street name in Address 1. Put Apt, Unit, or Ste in Address 2. Put delivery notes in a notes box, not in the address fields.
When A Form Has Too Many Boxes
Some forms add fields for building name, entrance, district, or landmark. Fill what the carrier needs to find the door. Put gate codes, buzzer codes, and “leave with neighbor” notes in the delivery notes area.
When A Form Has Too Few Boxes
If there’s only one address line, keep street and unit together, then trim extra words. “123 Pine St Apt 4B” reads clean. Avoid squeezing the unit into the name field, since that can confuse label printing and pickup scans.
If a form gives only one address line, keep street and unit on the same line and shorten other words before you invent odd abbreviations. A clean, standard “Apt 4B” beats a clever short form.
Address Line Patterns By Country And Region
When you mail across borders, use the destination’s line order, then add the country name as the last line in capital letters. Many countries place the postal code before the city, so don’t assume your home format will work everywhere.
| Destination | Where The Postal Code Goes | City Line Pattern |
|---|---|---|
| United States | After region | City ST 12345 |
| Canada | After province | City AB A1A 1A1 |
| United Kingdom | Last line | POST TOWN then postcode |
| Australia | After state | City STATE 1234 |
| Germany | Before city | 12345 City |
| France | Before city | 12345 CITY |
| Japan | Before prefecture | Postal code, prefecture, city |
| Brazil | Near the end | City ST then CEP |
International Mail Checklist
Cross border mail works best when the recipient can read it as is. Write the street and locality the way the recipient writes it. Keep the address block free of phone numbers and email unless the carrier label asks for them.
For UK destinations, follow the post town and postcode layout the recipient gives you.
Write the destination country name on the last line, alone. Use a full country name, not a two letter code, and don’t write a continent name.
Keep the destination city and postal code in the destination’s usual order, even if it looks backward to you. If the recipient gives a local script version, you can add it above the Latin letter version, as long as the Latin letter block is still complete.
Copy And Paste Checklist
Once you know how to properly write an address, a final scan takes less than a minute. Use this list right before drop off or label purchase.
- Recipient name matches the mailbox or business sign.
- Street line includes number, street name, and street type.
- Unit line is present when the destination has units.
- City line uses the correct city spelling and region code.
- Postal code matches the city and sits on the city line.
- Country line is present only for cross border mail.
- Return address is in the top left and not under postage.
- Address block has clear margins and no tape glare.
Sample Layout You Can Copy
Sender (top left):
Sam Lee 45 Oak Rd Apt 7C Springfield IL 62704
Recipient (center):
Jordan Patel 1280 W Lake St Ste 210 Chicago IL 60607
Final Pass Before You Mail It
Read the address block once from bottom to top. If every line is clear at a glance, you’re set. If something feels cramped or ambiguous, rewrite it with fewer words per line or print a label. That quick redo can save a reroute, a return, and a lot of tracking refreshes. Snap a photo of the label before shipping, then keep it. Saves time later.