LetterAgent
Mail physical letters by just asking your AI assistant.
Home > Guides > Printed address labels
Yes. A printed address label is fully acceptable on a letter, and mail sorting machines usually read machine-printed text more reliably than handwriting. Use dark ink on a plain light label, place it where the address normally goes, and keep it flat and fully stuck down. A label never needs a special format to be delivered.
Postal services do not care whether an address was handwritten, typed, or printed on a label. What matters is that the address is complete, correct, and readable by the machines that sort mail. In that sense a printed label is often the safer choice, especially if your handwriting is hard to read or you are mailing many letters at once. Businesses have used printed labels for decades, and nothing in postal rules treats them as second class.
Put the delivery address label in the same place a handwritten address would go: the lower right area of the front of the envelope, roughly centered left to right, with clear space around it. Keep the label away from the very bottom edge of the envelope. Sorting machines print a routing barcode along the bottom edge, and a label sitting in that strip can block it or confuse the scanner.
The return address label goes in the upper left corner, the usual spot. If you use a single label sheet that prints both addresses, check that the two labels do not overlap and that neither one covers the stamp or postage area in the upper right corner. A label that creeps under a stamp can cause the postage to be missed by the cancelling machine, which can delay the letter.
Most label problems come down to contrast and condition, not the label itself. Light ink on a dark label, fancy script fonts, and text squeezed into a tiny label all make the address harder for a scanner to read. So do labels that peel at a corner, wrinkle, or curl after going through a printer. A curled corner can catch in sorting equipment and tear the label off entirely.
Inkjet-printed labels deserve one extra check. Inkjet ink can smear if the envelope gets wet, and a smeared address is a lost letter. Laser-printed labels hold up better in rain, and a quick test helps: rub a printed label with a damp finger before you seal the envelope. If the ink smudges, switch to a laser printer or a pen for that batch. Clear labels look tidy, but they can confuse scanners if the envelope underneath is patterned or dark, so white or pale labels are the safer default.
| Label choice | Why it works or fails |
|---|---|
| White label, black sans-serif text | Highest contrast; scanners read it most reliably. |
| Laser-printed label | Ink resists water and smudging in wet weather. |
| Clear label on a patterned envelope | The pattern shows through and can break up the text for scanners. |
| Label covering the bottom edge | Blocks the routing barcode strip and can delay or misroute the letter. |
| Peeling or wrinkled label | Can tear off in sorting machines, leaving an addressless envelope. |
No. A label has no effect on postage by itself. Postage depends on the envelope size, weight, shape, and destination, not on how the address got onto the envelope. One small exception is worth knowing: if you stick a thick, padded, or layered label onto a thin card or envelope, the added bulk can push a borderline item into a higher postage category. A single flat paper label will not do that, but a stack of labels, or a label with a thick plastic coating, can change how a sorting machine classifies the piece.
Yes, with the same placement rules. Certified mail in the US and registered mail in Canada both rely on the delivery address being readable, and a printed label serves that purpose well. The certified or registered barcode label applied by the post office goes in its own spot, usually across the top of the envelope, so your address label and the postal barcode do not compete for the same space. If a clerk places the postal label over part of your address, ask them to reposition it before the letter is accepted.
LetterAgent works differently: your letter is printed on standard letter paper and mailed in a double-window envelope, so the recipient address and your return address show through the windows. You do not need to print or stick any label yourself, and there is no envelope for you to address. If you are mailing a letter on your own, though, a printed label is a perfectly good way to address it. Just keep the text dark, the label flat, and the bottom edge of the envelope clear.
Ready to mail it? Send your letter with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and it is printed and mailed.
LetterAgent is a working name. Prices include print, postage, and our service fee. US prices in USD, Canadian prices in CAD (Canadian prices exclude applicable sales tax, added at checkout). Currently in private testing.
Need help? Ask your assistant: it can check a job's status any time. If it ever can't handle something: hello@getletteragent.com