Recipient name (full name)
Street address (include apartment/suite/unit number)
City, state/province, and ZIP/postal code
Country (if mailing internationally)
(Optional) Company/organization name (if applicable)
(Optional) Attention line: Attn: [Name/Department]
Return address (your name or organization, street address, city, state/province, ZIP/postal code, country if applicable)
Place the return address in the top-left corner of the envelope
Place the recipient address in the center of the envelope (or slightly to the right of center)