[zerkhos]

here is their answer, that was quick :

Since your original package appears to be lost or stolen, we will need you to provide us with another address that will enable the carrier to perform a more secure delivery.

If you’re unable to provide a secure address, we recommend contacting the carrier to identify secure carrier locations where your package can be delivered and held for pickup. Note: Options may vary depending on the carrier and your location.

Without a secure address, we will need to issue a refund for your purchase instead of sending a replacement.

Please respond once you’ve identified a more secure address.

since i'm on good terms with my neighboor i will just change the address to his and then proceed to switch the decks and ask for a refund

why would you not just ask for the refund initially? rather than go through the hassle of the replacement and then returning it?

By browsing this forum, i saw that the warranty for a lost deck was void, and that there was a risk of steam "branding" the lost deck as stolen thus banning the account that would log on it.
I think it's safer to do this but i don't know if someone already did it


EDIT :
After much thinking (less than an hour...) and the fear of steam actually checking the serial code, i think i will ask the support to refund me and cancel my delivery
I will keep you updated.