Write your return address in the top-left corner:
Name
Street address (apartment/suite included)
City, State/Province, ZIP/Postal code
Country (if applicable)
Write the recipient’s address in the center of the envelope:
Name
Attn (if applicable)
Street address (apartment/suite included)
City, State/Province, ZIP/Postal code
Country (if applicable)
Include the correct ZIP/Postal code for the destination.
Use the full state/province name or the standard abbreviation.
If mailing internationally, write the country name on the last line in all caps.
Use consistent capitalization and clear, legible handwriting or printing.
Place postage in the top-right corner.
If using a business envelope, include the company name on the recipient line before the person’s name (if appropriate).
If using a PO Box, place “PO BOX” followed by the number on the street-address line.