Addressing library
Envelope addressing guides for the details that cause mistakes
Clear examples for apartment numbers, business recipients, suite lines, and the placement rules that make a US delivery address easier to read.
How to address an envelope with an apartment number
Learn where to put an apartment number on a US envelope, how to use APT or UNIT, and what to do when the full delivery address does not fit on one line.
6 min readBusiness mail formatHow to address a business envelope correctly
Format a US business envelope with a company name, attention line, department, suite number, return address, and clear USPS-style delivery address.
7 min readCopy and paste address formatMailing information for an envelope
Use these copy-ready US envelope address blocks for a letter, apartment, business, or PO Box. See exactly what mailing information belongs on each line.
7 min readReturn and delivery address placementEnvelope to and from format
Learn the correct envelope to and from format for US letters, including return address placement, recipient lines, postage, and a copy-ready example.
6 min readUnited Kingdom addressing guideUK letter envelope format
Learn the basic UK letter envelope format, including the recipient block, post town, full postcode, return address, and the differences from US mail.
7 min read