Write the recipient’s full name on the first line
Write the street address or P.O. Box on the second line
Write the apartment, suite, or unit number if needed on the same line or above the street address
Write the city, state or province, and postal code on the next line
Write the country on the last line for international mail
Use clear, uppercase or neatly printed letters
Place the address in the center of the envelope
Write the return address in the top-left corner
Leave the stamp in the top-right corner
Avoid punctuation unless required by local postal rules