Help Center - Can any package be sent with Delivery Confirmation?

Yes, provided that the package is at least 3/4 of an inch thick ("at its thickest point"), according to USPS Delivery Confirmation Regulations, and is being sent to a USPS-validated address.

If your package is NOT 3/4 of an inch thick, then it must meet ALL of the following criteria:

1. "rigid" (most books are)
2. be greater than 6" x 3" x 1/4 " in dimension
3. weigh more than 6 ounces

source: USPS Delivery Confirmation Regulations.

If you are concerned that your package does not meet the dimensional criteria above, you can always "bulk up" its dimensions with lightweight material that will not add significant weight (for example, Styrofoam, crumpled plastic bags or paper).

Related Links:

What is PBS Delivery Confirmation?
I can't use PBS-DC for this address? Why not?