In a group chat only admins will be allowed to turn disappearing messages on or off. “If a disappearing message is forwarded to a chat with disappearing messages off, the message won’t disappear in the forwarded chat. If a user creates a backup before a message disappears, the disappearing message will be included in the backup. Disappearing messages will be deleted when a user restores from a backup”, WhatsApp said on its FAQ page. WhatsApp has issued a warning to users saying that this feature should only be used with trustworthy recipients.