Question

if someone blocked then how the blocked person can know that he or she is blocked

Answer 1

Blocking someone is completely confidential, and the person will not be notified that he or she has beenblocked. However, they may notice that you are not on your friends list or are unable to see you on Facebook and then realise they have beenblocked

Answer 2

Hello friend..

Here's Your Answer

If you have blocked someone then the person will not able to see your chat or inbox...

Hope it helped you
=KANISHKA