An Audible gift (membership or title) can only be redeemed on the same marketplace the gift was purchased.
If you want to purchase a gift for someone who resides in the US for example, we recommend purchasing the gift in the Audible.com website which is Audible US base market. You can use the same email address and password you use in Australia to sign in to the Audible US website.
Audible operates across many countries and as a result we have created separate marketplaces to better cater content for each region.Currently, there is Audible.com - the US marketplace, Audible UK, Audible DE (Germany), Audible FR (France), Audible JP (Japan), Audible.com.au (Australia), and Audible IT (Italy).Audible JP (Japan), Audible CA (Canada), Audible IN (India).