My account was randomly locked on Nov. 23, with no notification. When I logged in, Amazon asked for some supporting documents for my most recent purchase, which I submitted right away. I never heard back from an account specialist, aside from an automated email saying my account was in a “temporary hold due to unusual activity” and that I needed to login and provide some documentation …

https://www.reddit.com/r/amazonprime/comments/kbei8x/locked_amazon_account_story_with_resolution/