The USPS automatically generates tracking numbers for most non-commercial domestic parcel services except First-Class Mail ...

Still haven't sent out your Christmas gifts? USPS is encouraging people to ship early and recommends using their shipping ...

Make all writing on any envelope or label easy to read ... United States (Lower 48 states): USPS Ground Advantage service: Dec. 18 First-Class Mail service: Dec. 18 Priority Mail service ...