The one rule: the card has to arrive
A postcard is a small act of attention — and half of that act is the sending. A beautiful message on a card that never arrives is a card nobody reads, so the practical side matters as much as the words. The whole process is four steps: choose the card, fill the back, put on the stamp, drop it in the mail. None of them are hard; all of them have small habits that make the difference between a card that arrives and a card that sits in a sorting machine for weeks.
The good news: postcards are the easiest thing in the postal system. They are light, flat, and standard-sized, which means they travel cheaply and quickly almost everywhere in the world. If you can mail a letter, you can mail a postcard — this guide just makes sure you do it the way that works first time.
Pick a card worth sending
The sending starts before the stamp. A card chosen for a reason travels better than a card grabbed at the airport — the reason shows up in the message. If you're traveling, pick a card of the place you're actually in; the atlas is organized exactly this way, country to state to place, so it's easy to find what a place looks like as a postcard. If you're writing from home, pick a card of your own corner of the world; the guide to sending from home walks through choosing a local card for the Postcrossing exchange.
A vintage-style card from the Old Route Retro atlas is made for this: it's a new card drawn in the spirit of old travel, printed to be written on and mailed, so you can fill it without guilt. Check that the card is clean, dry, and flat — a creased or damp card is the one kind that genuinely struggles in the mail.
The back of the card, mapped
Turn the card over. The back is a grid of jobs, and each job has its place:
The message goes on the left side of the back on a divided card — or, on a single-sided card with a picture on the back, on the left of the picture area. Three to five short lines fill a card comfortably; the what to write guide covers the words themselves.
The address goes on the right side — a single clear block, starting roughly halfway down the card. Leave it alone once written: no doodles, no message lines wandering into it, nothing the sorting machines could misread.
The stamp goes top-right, and it is the only thing that goes there.
The return address — yours — goes top-left, small, so that if the card can't be delivered it can come back to you instead of vanishing.
Writing the address so it arrives
The address is the one part of the card that must be mechanical. Write it the way the postal service of the destination expects, in one clear block, in pen:
Name on the first line. Street — house number and street name — on the second. City or town, and the state or region with its ZIP or postcode, on the third. Country on the last line if the card is going abroad, written in English or the destination's own language — this is the line that decides which country's sorting system gets it.
Keep the whole block clear of the stamp and of the card's edges. If you're unsure of a ZIP or postcode, look it up — it's the difference between arriving in days and arriving eventually. And always add your return address top-left: it's the small insurance that a card which can't be delivered comes back to you.
Stamps and postage
Postcards travel at a special rate in most postal systems — cheaper than a letter, because they are lighter and flatter. A postcard stamp is usually enough for a standard card within your own country; international cards need international postage, which is more. If in doubt, ask at the post office counter and let them weigh the card — it's the fastest way to be sure.
Where do stamps come from? Post offices sell them; some shops, tourist offices, and hotel desks do too; and many postal services sell them online to print at home. Buy a few extra and carry them with the cards, so a card written at a café doesn't wait for a stamp hunt.
One rule about the stamp: it goes top-right and stays clear of everything else. Never cover it with a doodle or a sticker — sorting machines read it, and an obscured stamp is a delayed card.
Into the mailbox
The last step is the easiest: a mailbox, a post office counter, or a hotel desk that takes mail. If you're traveling, consider mailing the card from the place itself — the postmark becomes part of the souvenir, a small proof that the card really traveled from there. If you're writing from home, the mailbox at the corner is the whole ritual.
Some people prefer to carry cards home and mail them from there — especially postcards bought early in a trip, when there's still room in the bag for them. Both work. What matters is that the card goes out; a card in a drawer is a message that never happened.
Postcrossing and the special cases
Two special cases are worth knowing. First, Postcrossing: every card in the exchange carries an ID code like "US-123456", and that code must be on the card, in a corner that won't collide with the address or the stamp — the recipient registers the card by it. The Postcrossing guide covers the sending side in full.
Second, unusual cards: a card that is very thick, very heavy, or oddly shaped may not travel at the flat postcard rate. If your card has a pop-up, a magnet, or a fold, ask at the post office whether it needs letter postage — the answer is usually yes, and a little extra postage beats a card that doesn't travel.
The five-second check before mailing
Before the card goes in the mailbox, run the five-second check:
Flat? No folds, no damp, nothing stuck to the back. Clear? The address block is legible and the stamp top-right is uncovered. Signed? The message has a name on it — a card without a signature is a card that seems to have sent itself. Return? Your address is top-left, small. Ready? You know which mailbox or counter it's going to, and you're not going to "get to it later" — later is where postcards go to die.
How long does a postcard take?
Postcards are not fast, and that's part of the charm. Within the same country, a card usually arrives within about a week; across borders, allow a week or two — sometimes more, especially at holiday peaks. If you're sending from far away, don't promise the arrival date; promise the thought.
The postmark is the only clock that matters. A card mailed from a place arrives with its own small proof of where it's been, which is exactly why the postcard — not the text, not the email — survives as a form.
The last line
Sending a postcard is a complete small act: you choose the card, write the words, address the back, buy the stamp, and hand it to the world. It takes more than a text and less than a letter, and it does something neither does — it arrives as an object, from a place, with your handwriting on it.
The rest of the ritual is covered in the journal: what to write for the message, how to date the card, the Postcrossing guide for the exchange, and the journal itself as it grows. When you're ready to choose the card, start at the countries and follow the atlas down to a place that means something to you — then write, stamp, and send.