How do you know if they belong to an organized one?
To me, unless they are very outspoken about it, which only some are, it seems rather secretive?
There are many ways to do this. For one, you have a full list of all members of your own faith, so it's easy to know whether they belong to it or not. Then you can consult other friendly faiths if you desire. Further, if you have a level 3 temple in the region, a priest becomes a true faith detector and can tell you the faith of all of the region's knights.
Some are also foolishly vocal about it, too.
