Type or machine-print all address information.
Make sure print is clear and sharp.
Use no less than an 8 point font
Use simple fonts
Ensure address characters don't touch or overlap.
Use single line spacing
Black ink on a white background is best.
Maintain a uniform left margin.
Use upper-case letters
Omit all punctuation except the hyphen in the ZIP + 4
Include floor, suite and apartment numbers whenever possible.
Put the city, state and ZIP Code or ZIP + 4 code in that order on the last line.
Use standard two-letter state abbreviations.
When using window envelopes, make sure the complete address is always visible, even when the insert moves. Do not staple enclosures to prevent shift.
Leave one space between words and two spaces between the state abbreviation and the ZIP + 4 code
You will get the best possible service if you:
CAPITALIZE EVERYTHING IN THE ADDRESS
Use standard abbreviations for street names and suffixes
Eliminate all punctuation (except the hyphen in the ZIP + 4 Code)
Use 2 letter state abbreviations
Use ZIP + 4 Codes
Make sure the place (not office # or suite) where you want the mail delivered appears on the line immediately above the city, state and ZIP code line, for example:
123 W MAIN ST STE 400
P O BOX 125
But not both on the same line
For complete information on all addressing questions, please use the following link: http://pe.usps.com/text/qsg300/Q602.htm#1009536