Gift Card Caution intercepted twice in 10 days

This low rating is due to the interception, probably at the sorting center Chronopost valves (56), the gift card purchased once, indicated on their monitoring site "ds delivered the mailbox" and that m ' is never reached. After complaints from Amazon, a new card was sent. Even the problem of fictitious delivery, a few days later. After a second complaint, I was reimbursed by Amazon 5 Euro commercial gesture, but I was advised to renew my purchase and choose to send email directly to the recipient to avoid another flight. Done but after an hour, a shame because it was a Christmas gift.
Thank you to Amazon to have grown in my good faith and have opened an investigation to Chronopost, but why indicate on the envelope that it is a gift card? As much put a microphone that said 'poke me "(I have not found myself but my interlocutor Amazon told me it was easy to identify the gift cards to their packaging). Packaging to review?