Write the recipient’s full name on the first line
Write the company or department name on the second line, if applicable
Write the street address or P.O. box on the third line
Write the city, state, and ZIP code on the fourth line
Place the recipient’s address in the center of the envelope
Write your return address in the upper left corner
Place the postage stamp in the upper right corner
Use clear, legible block letters or printed text
Include apartment, suite, or unit numbers if needed
Use the correct mailing format for domestic or international mail