Starfleet Innotech Inc (SFIO)

[Suspect]

Fink's shipment was First-Class, not Priority.

From the USPS website:

Delivery Confirmation may be used with the following services:

First-Class Mail® Parcels
Priority Mail®
Package Services Parcels - Includes Parcel Post® , Media Mail® , Bound Printed Matter (paid by permit imprint only), and Library Mail.
Standard Mail® Parcels - must be less than 16 ounces and mailed at the electronic price.
Parcel Select® - must be mailed at the electronic price.
Hold For Pickup - Shipments are mailed and held securely at designated Post Offices up to 15 days depending on the product selected.