You can get duplicates if you do not pick up the mails. Since every reward for 2nd of 1st place actually has a page but the ones you've already learned are invisible. So until you learn it you can get as many duplicates as you want. They are entirely useless though.
Darkmage1337 wrote: »It would give more incentive for collectors and non-PvPers to do Battlegrounds to collect all of the Outfit Styles. I hope ZOS eventually adds the weapon variants to compliment the already-existing armor styles, too.