Addressing Tips and Tools Most mail in the U.S. is automatically sorted so it is very advisable to follow the U.S. Postal Service's guidelines.
http://www.usps.com/send/preparemailandpackages/labelsandaddressing/usingthecorrectaddress.htm
Postal
Abbreviations for the states and possessions.
http://www.usps.com/ncsc/lookups/usps_abbreviations.html#states
ZIP Code +4 A complete zip code helps the efficient delivery of mail http://www.usps.com/zip4
U.S. Stamps
There is no retail outlet for U.S. stamps in the U.K., but it is possible to buy stamps via the U.S. Postal Service's The Postal Store located at:
http://www.usps.com/shop
Return postage from the U.S.
Post Offices in the United Kingdom sell International Reply Coupons which can be used for the payment in advance of return postage. One coupon is exchangeable in any
country of the Universal Postal Union for a postage stamps representing the minimum
postage for a letter sent by air to a foreign country.
