Sealed type document bag, sealed in front of the PO counter staff?.
In any case I wouldn't send the original receipt, because you as the sender might/would need to make any claims against the insurance and have proof of cover.
Nokia 8 vs Galaxy S8
Best new design books 2017: From vintage infographics to the the psychology of type
iMac 21.5-inch (2017) review
Nokia 8 : design, caractéristiques techniques, date de sortie