<Li> Signature Confirmation requires a delivery signature, which is kept on file . The online tracking system displays the first initial and last name of the signatory . </Li> <Li> Special Handling is for unusual items, like live animals . </Li> <P> In May 2007, the USPS restructured international service names to correspond with domestic shipping options . Formerly, USPS International services were categorized as Airmail (Letter Post), Economy (Surface) Parcel Post, Airmail Parcel Post, Global Priority, Global Express, and Global Express Guaranteed Mail . The former Airmail (Letter Post) is now First - Class Mail International, and includes small packages weighing up to four pounds (1.8 kg). Economy Parcel Post was discontinued for international service, while Airmail Parcel Post was replaced by Priority Mail International . Priority Mail International Flat - Rate packaging in various sizes was introduced, with the same conditions of service previously used for Global Priority . Global Express is now Express Mail International, while Global Express Guaranteed is unchanged . The international mailing classes with a tracking ability are Express, Express Guaranteed, and Priority (except that tracking is not available for Priority Mail International Flat Rate Envelopes or Priority Mail International Small Flat Rate Boxes). </P> <P> One of the major changes in the new naming and services definitions is that USPS - supplied mailing boxes for Priority and Express mail are now allowed for international use . These services are offered to ship letters and packages to almost every country and territory on the globe . The USPS provides much of this service by contracting with a private parcel service, FedEx . </P>

Where does the us postal service get its funding