If you unblock a person in WhatsApp, will they know about it - briefly?
No, if you unblock someone on WhatsApp, they will not be notified about it. The action is entirely private and only visible to the user who performed it.
If you unblock a person in WhatsApp, will they know about it - in detail?
If you decide to unblock someone on WhatsApp, it's important to understand the implications and what the other party might be aware of. Unblocking a contact does not send them a notification or alert them in any way that they have been unblocked. This means that the person you unblock will not receive any message or indication from WhatsApp informing them about your action.
However, there are certain signs that could potentially hint to the other person that they may have been blocked and subsequently unblocked. For instance, if they try to send you a message while still blocked, it won't be delivered and they will see only one checkmark (indicating the message was sent but not received). Once you unblock them, any pending messages from before the block will not be delivered retroactively. If they send you a new message after being unblocked, it will show up with two checkmarks (sent and received), indicating that your status has changed.
Additionally, if the other person had your contact saved and noticed that your profile picture or status updates were no longer visible during the time they were blocked, seeing these changes again after unblocking could serve as an indirect clue.
It's also worth noting that if you have previously blocked someone and then decide to re-add them as a contact (instead of just unblocking), they will receive a notification saying "You have been added to [Your Name]’s contacts." This is different from simply unblocking someone, where no such notification is sent.
In summary, while unblocking someone on WhatsApp does not directly notify them, certain indirect signs might suggest that they were previously blocked and are now able to communicate with you again.