Use your full name or company name
Include your street address (with apartment/suite number if applicable)
Include city, state/province, and ZIP/postal code
Include country (if mailing internationally)
Place the “From” address in the top-left of the page or letterhead
Use the same format as the address you would write on an envelope
Example format:
John A. Smith
123 Main St, Apt 4B
Springfield, IL 62704
USA
Example format (company):
Smith & Co.
Attn: Accounts Receivable
500 Market Street, Suite 1200
San Francisco, CA 94105
USA
If using email, include “From:” in the header (email clients handle this automatically)
If using a formal letter, align the “From” block to the left margin and leave a blank line after it before the date