Come get your mail, overflowing U.S. post office tells Canadian customers | CBC News
This talks about USPS post office in Ogdensburg, NY but I imagine the same situation exists at other post offices and third party pick up locations along the US border.The U.S. Postal Service (USPS) office in Ogdensburg, N.Y., says it's no longer able to hold on to an overflowing amount Canadian mail — and customers north of the border are now scrambling to make alternate arrangements.
The office recently sent an email to its Canadian customers telling them that their PO box locations "have limited capacity to hold mail, including packages, for extended periods of time."
Canadians now have until March 15 to have someone get their mail, or it will be classified as "unclaimed" and returned to the sender...