To create an Amazon Household with another adult, you can either send an email invitation or sign in together to verify your accounts.
To send an email invitation to another adult:
Go to Amazon Household in Your Account and click Add an Adult.
Enter the name and email address of the adult you'd like to invite and click Continue.
If you want to share Prime benefits and create a Family Library, select the option to share your wallet.
Confirm the name and email address of the other adult and click Send Invite. They'll have 14 days to accept the invite. You can manage your invitation from Manage Your Household.
[it doesn't look like you need to live in the same house]
Paribus Just Launched New Delivery Monitoring Service and OMG
[if i am in a Household Account, how would a Paribus account work]