That's what I was thinking reading these replies. Amazon must be checking if you log in from the same IP as another seller, but how is that reliable in determining if it's a dupe? Why even allow users to log in from different computers if the only way they check for duplicate seller accounts is if someone else logs in from the same machine?

It seems like the author logged in to his seller account from a public wireless network (coffee shop, office) where another, previously-banned seller account had logged in from at one time, and Amazon assumed both accounts were from the same guy. Maybe they sold the same type of products.

I'm sure they get a lot of sellers who get their account closed and just try to make a new one, but I'd rather have Amazon not catch the sellers who are dumb enough to create an account from the same IP than catch them and get legitimate sellers banned in the process.