How to be unknown in tsum tsum and what to do if you're blocked by someone.

You may have noticed that some of the hearts you receive are from "unknown".

Here's why:

Someone out there adds you to their line friends and starts sending you hearts in Tsum Tsum.

There's three possible reasons they will appear as "unknown" in your Tsum Tsum mailbox:

1. You have not added them as a friend
2. You have blocked them and they have not blocked you.
3. There is a third reason.  Some people show up in Tsum Tsum, but the hearts they send never show up in Line. 

In case 1, they've added you but you have not added them.  You can find out who they are in the Line application.  Select Chats and look for people you have not added as friends.  They should appear with the time they last sent you a heart.

In case 2, you've blocked someone, probably because they did not send enough hearts for you to encourage you to keep them on your list.  This is perfectly ok for both sides, the blocker and the blocked.  The blocked person can still send hearts and will receive any hearts you return by using "Check".  Note that "Claim all" does not return any hearts, so use it sparingly and only after using Check on the unknowns.

In case 3, we suspect it is because they have line turned off in Tsum Tsum, but that is probably not be the whole story.  There are also cases where I send hearts and the hearts I send do not show up in line chat either.  Stay tuned someone will figure it out and the explanation may appear here.  

So what do you do if you think someone who should have you in their friends list has you blocked. 

First, don't take it personally.  Nobody owes anybody any hearts.  People try to keep the number of friends to a reasonable number and the number of hearts traded has to be equable to both sides. 

If you think they would benefit from your sending hearts in great numbers, try to contact them on Line Chat in one of the groups. 

If you don't think they would benefit , there are plenty of others who might be willing to trade just a few hearts with you. And in the words of one of the Tsums, "Let it go!"