Write the sender’s address in the top-left corner
Include the sender’s name (optional)
Include street address, apartment/unit number (if any)
Include city, state/province, and ZIP/postal code
Include the country (if mailing internationally)
Leave a blank line or gap after the sender’s address
Write the recipient’s name in the center or slightly right of center
Include the recipient’s street address and apartment/unit number (if any)
Include city, state/province, and ZIP/postal code
Include the country (if mailing internationally)
If delivering to a specific person or department, add “Attn:” or “c/o” before the name (if applicable)
Use clear, readable handwriting or printed labels
Use dark ink and write in all caps if your style allows
Make sure the postal code is correct and placed on the last line of the address
If using a business envelope, consider adding the company name above the street address
If needed, add a return address line on the back flap or upper-left back area per your local postal service rules