• Type, machine or hand print all address information.

• Use upper-case letters.

• Make sure print is clear and sharp.

• Ensure address characters don’t touch or overlap.

• Black ink on a white background is best.

• Maintain a uniform left margin.

• Omit all punctuation.

• Include floor, suite, and apartment numbers whenever possible.

• Put the city, state, and ZIP Code or ZIP+4 in that order on the last line.  If there’s not   enough room, you can put the ZIP Code or ZIP+4 alone on the bottom line.

• Use standard two-letter state abbreviations (See References for list).

• When using window envelopes, make sure the complete address is always visible,   even when the insert moves.

• Leave one space between words and two spaces between the state abbreviation   and ZIP Code or ZIP+4 Code.