Nope---not what I said! Please check your reading comprehension. It is a Federal Requirement to advise the shipper that you are shipping a firearm. If a 3rd party has done this already and satisfied that requirement, then there you go.
Read this and weep:
18 U.S. Code § 922 - Unlawful acts
"
(e)
It shall be unlawful for any person knowingly to deliver or cause to be delivered to any common or contract carrier for transportation or shipment in interstate or foreign commerce, to persons other than licensed importers, licensed manufacturers, licensed dealers, or licensed collectors, any package or other container in which there is any firearm or ammunition without written notice to the carrier that such firearm or ammunition is being transported or shipped; except that any passenger who owns or legally possesses a firearm or ammunition being transported aboard any common or contract carrier for movement with the passenger in interstate or foreign commerce may deliver said firearm or ammunition into the custody of the pilot, captain, conductor or operator of such common or contract carrier for the duration of the trip without violating any of the provisions of this chapter. No common or contract carrier shall require or cause any label, tag, or other written notice to be placed on the outside of any package, luggage, or other container that such package, luggage, or other container contains a firearm.
You do not have to when using Shipmyguns and what you were being told. I read what you said and comprehended it just fine.