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 on the same line as the street address or on the line above it
Write the city, state or province, and postal code on the third line
Write the country on the last line if mailing internationally
Write your return address in the top left corner
Place the postage stamp in the top right corner
Use clear, legible handwriting or printed text
Keep all address lines centered or aligned neatly on the front of the envelope
Avoid using abbreviations unless they are standard and accepted by postal services