STEP 1: Open the WhatsApp app and select the contact you wish to send disappearing messages to. STEP 2: Open the contact information section on Android. On iOS, click on the name of the contact. STEP 3: Scroll down to the Disappearing Messages option. Tap on ON to enable it. STEP 4: Once the option is enabled, you should get a message that reads, “You turned on disappearing messages. New messages will disappear from the chat after 7 days. Tap to change.” STEP 5: Once the feature is enabled, all messages you send to the contact will disappear after seven days. STEP 6: To turn off the disappearing messages feature, repeat the same steps — open contact info > Disappearing Messages > tap on the option > click on OFF.