How to Address an Envelope Correctly: Step-by-Step Format Guide and Best Practices
Q1: Is it mandatory to write envelope addresses entirely in capital letters?
A1: No. While the USPS strongly recommends all-caps block lettering to maximize machine reading accuracy, standard title-case handwriting (capitalizing only the first letters of names, streets, and cities) processes smoothly as long as the handwriting is clear, upright, and separated from borders.
Q2: Where do I write the apartment number if the street address is too long?
A2: Place the apartment or suite number directly above the street delivery line. The postal sorting system reads addresses from the bottom up: City/State/ZIP first, then the delivery line, then secondary unit numbers.
Q3: What happens if I forget to include a return address?
A3: If your postage is sufficient and the recipient address is accurate, the envelope will deliver normally. However, if the destination address is invalid or the recipient has moved without an active forwarding order, the letter cannot be returned to you. It will be routed to the USPS Mail Recovery Center in Atlanta, Georgia, where untracked pieces with no identifying origin are securely shredded or discarded.
