Can a contact see that I have unblocked them in WhatsApp - briefly?
No, a contact cannot see that you have unblocked them in WhatsApp. The unblocking process is private and not visible to the other party.
Can a contact see that I have unblocked them in WhatsApp - in detail?
When you block someone on WhatsApp, they are removed from your contacts list and cannot send you messages or view your status updates. However, if you decide to unblock them later, you might wonder whether they will be notified of this change. The answer is no; the contact cannot see that you have unblocked them in WhatsApp.
WhatsApp does not send any kind of notification or alert when a user unblocks another user. This means that the person you unblocked will not receive a message, an email, or any other form of communication informing them about the change in your settings. They will only be able to contact you again if they add your phone number back into their contacts list and initiate a new conversation.
It's important to note that while the contact cannot see that you have unblocked them, there are some changes they might notice. For instance, if they try to send you a message after being unblocked, WhatsApp will not show any delivery status or read receipts until you reply to their message. This can give them an indication that something has changed, but it does not explicitly inform them that they have been unblocked.
Additionally, if the contact had your phone number saved in their contacts before you blocked them, their device might automatically update the contact status once you unblock them. However, this is a feature of the device's operating system and not WhatsApp itself, and it does not send any notification to the user.
In summary, while a contact cannot see that you have unblocked them in WhatsApp, they might notice some changes in their ability to communicate with you. However, WhatsApp does not provide any explicit notifications about being unblocked.