Write the recipient’s name on the first line (e.g., John Smith)
Write the street address on the next line (include unit/apartment/suite if applicable, e.g., 123 Main St Apt 4B)
Write the city, state/province, and ZIP/postal code on the next line (e.g., Springfield, IL 62704)
If sending internationally, include the country on the last line (e.g., United Kingdom)
Place the “From” address in the top-left corner of the envelope
Write the sender’s name on the first line under “From”
Write the sender’s street address on the next line
Write the sender’s city, state/province, and ZIP/postal code on the next line
If sending internationally, include the country on the last line
Use clear, legible handwriting or printed labels
Align all lines to the left side of their address block
Use standard abbreviations for state/province and address elements (e.g., St, Ave, Apt) when applicable
Avoid punctuation or special symbols in address lines unless required (e.g., hyphens in ZIP+4)