WhatsApp has given us an amazing feature to delete a sent message from both the ends. It's a kind of a useful feature in any event if someone has sent something mistakenly. But, once the message is deleted, WhatsApp officially doesn't offer the feature to check the message.
With the help of a third-party application, it is possible to check the deleted messages. To read the erased WhatsApp messages, you need to install an application called WhatsRemoved+. Andriod users can download this app from the Google Play Store and as of now, it's not available for iPhone users.
After the WhatsRemoved+ application has been installed, you need to provide all the needful permissions to the app. Strikingly, the application contains ads as it is liberated from cost. The application will generally ask for the permission of reading the notifications of the phone, click Yes to agree.
Apart from WhatsApp, this application can also be used for Facebook and Instagram. WhatsRemoved+also gives you the feature to save all the deleted messages in a text document, if you need to store them in a separate document, you can do that too.
Although it's a third-party application, you should read all the permission required by the application because WhatsApp does not offer such a feature in its official application.