How To Delete Sent Messages On Facebook
Action 1: Sign in to your Facebook account.
Step 2: Click the "Messages" switch in the menu on the left to open the Messages page.
Step 3: Click the conversation that contains the sent messages you wish to erase. Facebook shows conversation threads in date order with the most recent at the end of the page.
Step 4: Click the "Actions" button on top of the conversation display.
Step 5: Select "Delete Messages" from the pull-down menu.
Action 6: Click to make it possible for the check box beside each sent message that you wish to delete.
Action 7: Click the "Delete Selected" button and after that click "Delete Messages" in the verification pop-up home window. Facebook removes the chosen messages.
Suggestion: To remove a whole conversation, consisting of all obtained and also sent messages, click the "Delete All" option after opening the "Delete Messages" screen.