There are three addresses for each account. Often the are the same but they can be different if needed.
This is included in the footer of emails for CAN-SPAM compliance unless a custom footer is used.
If you have multiple subaccounts they can all have a different mailing addresses.
The mailing address is editable by all users who have access to update account settings.
The billing address appears on invoices. There is only one billing address even if you have multiple subaccounts. It can only be updated by admin users.
The payment address is tied to credit cards. You may have a different payment address if your credit card account uses an address that's different than the address that appears on invoices.
There is only one payment address even if you have multiple subaccounts. It can only be updated by admin users.