Whatsapp has recently enabled a option ✓✓ blue ticks, which means the sent message has been read.You can also disable from Blue ticks by just disabling the read receipts option available on your whatsapp. (It’s only available to Android users who have downloaded the new beta version of the app Whatsapp v2.11.444).After downloading,
Go to your settings option available in your whatsapp. There you will find Privacy, tap on privacy and disable Read Recepients.
Unfortunately presently its not avaliable for Iphone so try below options if you are Iphone users:
Another Solution for How to Hide or Disable ‘blue ticks’ on WhatsApp is Snowball Beta. Its an app which collects all your messages from all messengers including Whatsapp and the best thing is that WhatsApp won’t consider that the message has been read !!