ShipRush USPS offers the following Postal Services shipping services:
Domestic parcel services:
USPS Express Mail
USPS First Class Parcel
USPS Priority
USPS Media Mail
USPS Parcel Post
USPS Bound Printed Matter
USPS Library Mail
International parcel services:
USPS Express
USPS First Class
USPS Priority
Delivery Confirmation (aka DC)
The Postal Service does not offer DC on letter post (letters,
postcards and flats). All ShipRush processed parcels automatically have
DC.
ShipRush generated parcel shipments qualify for the electronic DC rate, which is only $0.18 (at the post office it is $0.65 - $0.75).
To qualify for DC, the shipment must be processed as a First Class Parcel, and also qualify for the Parcel rate. At least one of these general rules should be true of the shipment for it to qualify as a Parcel:
Item is at least 3/4" thick
Item is in a box
Item is rigid (e.g. does not bend), if it is thinner than 3/4"