Everyone should only use the official WhatsApp and don’t download imitations or fake versions as a way of getting more accounts on your phone. Your messages are only secure and private when using the official WhatsApp.

According to new WhatsApp privacy policy, if a message cannot be delivered immediately (for example, if the recipient is offline), WhatsApp keep it in encrypted form on WhatsApp servers for up to 30 days as WhatsApp will try to deliver it. If a message is still undelivered after 30 days, WhatsApp  will delete it.