[mothered]

A lot of users focus on the Amazon account Itself, when In fact the weakest point of security, Is the account's "recovery options".

If an email account Is the point of recovery, compromise that (by checking out It's recovery options as well If needed) and reset the account's password thereafter. Alternatively, If you know enough Information about the account holder, contact Customer Service and SE them. It's not always about the account In question.

UMMMM? WHAT?

What Is It you don't understand?

It's pretty simple- If the primary account (Amazon) has an email account as a recovery option, compromise that, generate a password reset link to that email account, reset the password and login to the Amazon account thereafter.