FedEx FedExed me once on a three-coin shipment from France which was seized by Customs pending the results of a phone interview in which I was "coerced" into providing exceedingly more intrusive personal information including my full name, DOB and SSN -- MIND YOU IN REAL TIME, OVER THE PHONE and the return of Customs' documents e-mailed to me requesting specific details, or else the shipment being held hostage for ransom at an amount for $33. would be returned forthwith.
FedEx lied to me about every aspect of the shipment claiming it arrived undocumented from an unknown source -- a prominent name and well-established reputation on a par with Stack's Bowers -- which I only discovered upon its release from Customs and delivery to my door notably with a clearly marked return address and complete documentation with invoices noting numismatic collectibles. One could argue I was not compelled to answer any questions, but the entire transaction was legitimate and legal and placing an order and transmitting funds is something I've grown accustomed to and I had absolutely nothing to hide. I subsequently found out from @Conder101 who just now chimed in, that what Customs did was improper and the penalty exacted unwarranted. I have never had a shipment from any source seized before or since but I think it safe to say anything is possible nowadays. And the injustice done to me? I guess that's the cost of doing business. I was informed by the sender that the shipment, initially sent by DHL, had been returned for unspecified reasons and whether it would be alright to use FedEx and said, Sure, go right ahead.
After this incident, I examined all my prior invoices in an attempt to ascertain what the problem was and noted that the products being shipped were "documents." Hmm, true. Was this a clever ploy to circumvent Customs? I will never know. (And thank you once again Mighty Conder for going the extra mile for me by supplying helpful references and footnotes to applicable law.)