Old Box Numbers
Take a good look at your incoming U.S. mail. Does it use old box number? These numbers include P.O. Box 3333, 6666, 4-digit numerical box numbers (such as 1958, 2006, 2964), and numerical-alpha box numbers (like 1-A, 1502-A, 1603-A, 1604-A).
These old box numbers have not been used by Yale for almost twenty years, yet we continue to see mail arriving daily with these old numbers.
If mail reaches your department with old box numbers or street addresses, please contact the senders immediately asking them to correct their database to show your correct post office box number (usually 6 digits) and zip code with add-on.
Because, over the years, the number sequence of these boxes has been assigned to other towns, it is very possible your mail will not even come into Yale University but will be returned to sender as insufficiently addressed. Don't let this happen to your mail!