I have had some ask how/where to buy a badge for Knight Protector or Knight Chancellor

It's NOT a badge, it's under Merchandise:

tabletop.events/conventions/ntrpgcon-2018/merch

If you meet the requirements to have the Rank of Knight Protector or Knight Chancellor, then make your commitment (purchase) for that Rank.

If you are not sure if you qualify, please check the list:

ntrpgcon.com/KnightProtector.html

If my list is incorrect, please send me some info to show you attended Cons I don't have you down for.