Achievement reward notifications

I thought it would be nice if when you completed an achievement that has a reward, the UI would highlight the category of that achievement to let you know that you have unclaimed rewards from that particular NPC. When I complete an achievement, I might not necessarily want to run right out to the NPC to claim the reward, and after awhile I usually forget that I even got the reward or what achievement it came from (particularly title rewards).

I've gotten a lot of achievements since they came out, but I don't know which NPCs I need to speak with in order to claim my rewards. I really don't want to go to all the NPCs just to find out if there's a reward I havn't gotten yet.

Each Achievement categories should tell you where you to talk to the specified NPC to claim your award.

For example, Go to Battle category, select it, and it'll tell you what the NPC name is, and where to find them. If you win an item in that category, you need to talk to the said NPC.

You missed the OP's point.
He just wants a notification to remind him which reward he hasn't claimed.