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 Library Mail
International parcel services:
USPS Express
USPS First Class
USPS Priority
Delivery Confirmation (aka DC)
What is Delivery Confirmation?
From www.usps.com:
"Verify delivery with Delivery Confirmation. Our low cost Delivery Confirmation service gives you the date, ZIP Code™ and time your article was delivered. If delivery was attempted you will get the date and time of attempted delivery..." (Full explanation here.)
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).
For applicable shipments, ShipRush always includes DC.
This is by design and cannot be disabled or turned off.
To qualify for DC, shipments 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"
In other words, it is not permissible to take a #10 envelope, put a piece of paper in it, and mail it as a First Class Parcel. (That is what a Priority Mail Envelope is for!)