What Happens When You Block Someone On Facebook And Then Unblock Them?
It's important to note that when you block someone on Facebook, you will also automatically unfriend them. Unblocking them will not automatically add them as a friend again -- you will need to send them a separate friend request after you unblock them if you wish to be their friend again.
Does unblocking someone on Facebook Refriend them?
Refriending on Facebook Is Possible, Even After Blocking As we've seen, as long as you unblock someone on Facebook and send them a friend request again, you can refriend that user.
How to Refriend Someone You Blocked on Facebook
Will someone know if I block and unblock them?
Blocking means blocking all transmissions. if you had sent a message then blocked them. the person won't see the message until you unblock them, but sending it during the person being block won't see or receive anything.
If I am blocked by a person, and he later unblocked me, would ... - Quora