Old Chats disappearing from Whatsapp Old Chats are disappearing from my Chat-Overview in Whatsapp. I did not delete them, and they are still there: When I search for a contact and then click on them, I can see all the messages of the chat, but nevertheless this chat is missing from the Chat-Overview.

Now my problem is: One of my contacts has quit whatsapp over a year ago, so their account is not active anymore. And therefore I do not see them in my contacts-list. If only I could click (or tap) on that contact, then all the messages would be there again, I am quite sure.

But how can I open this chat, which is not visible in the chat-overview anymore and does not have a valid contact attachted to it?
My guess is, that you archived your chats. To find your archived chats, scroll down to the bottom of main WhatsApp page and you'll see the archive tab. Open it and your chats should all be there. Long press on any of them and move them back.

You can also try searching for a word that you might have written to a contact. For example, if you search for the word "thanks" in WhatsApps main search bar, that should bring up any chat that the word was written in.