If I block a person on WhatsApp and later unblock them, will I receive the messages that were sent to me while the sender was blocked?

When you block someone on WhatsApp, you will not receive any messages they send during the time they are blocked. Even if you later unblock them, those messages will not be delivered to you. The messages sent by the blocked person remain on their device but are not transmitted to yours124.

To see the messages sent while the person was blocked, you would need to ask them to forward those messages to you after you unblock them. Alternatively, they could take screenshots or forward the messages manually, but there is no automatic way for you to receive these messages through WhatsApp once you unblock them12.

If you have a backup of your WhatsApp chats, you might be able to retrieve blocked messages by restoring from that backup, but this method does not apply to messages sent while the person was blocked, as those are not stored in your backup35.