How to recover deleted messages in Vk.com

Initially, it is impossible to restore a completely deleted dialog in Vkontakte.
But there are a number of ways to return some part of the old correspondence.
    1. The assistance of a companion.
In this case, you can ask the interlocutor to forward all or some specific part of the history of your correspondence. Vkontakte allows mandrel up to 100 messages, the maximum level of nesting up to 45 transfers and in total up to 500 different names.
    2. The archive request
It is worth noting that the more messages there were in the deleted dialog, the more data you will most likely not be able to recover. Vkontakte has a threshold of up to 15 million messages per profile, after reaching this figure, old messages begin to be deleted in a chaotic manner. You must ask the other side of the dialog to visit a special page https://vk.com/data_protection?section=rules&scroll_to_archive=1. At the very bottom there will be the necessary button "Request archive", we ask the second participant of the dialog to select the "Messages" parameter. In this case, the process will take much less time. Next, you need to confirm the password and upon completion of the formation of the archive, the second party will receive a notification on behalf of the administration of the social network. Further downloading requires confirmation of the interlocutor by entering data from the SMS.
The archive is a regular folder containing the Message directory and minor files.