Step by step way to turn off Read Receipts notification...

Step 1:            Open WhatsApp in your mobile device..

Step 2:            Open your WhatsApp setting in your phone...

Step 3:           Then you see like this..

Step 4:         Now choose Account option...

Step5:         Now open Privacy option off your WhatsApp..

Step 6:          Here you see Read Receipts with Checkbox.

Step 7:         If that Check Box is Checked, Unchecked that CheckBox.

Now your Read receipts notification is off.