How To Delete Sent Messages On Facebook
Step 1: Sign in to your Facebook account.
Step 2: Click the "Messages" switch in the menu on the left to open the Messages page.
Action 3: Click the conversation which contains the sent messages you want to delete. Facebook presents conversation strings in date order with one of the most current at the bottom of the web page.
Tip 4: Click the "Actions" button at the top of the conversation display.
Tip 5: Select "Delete Messages" from the pull-down menu.
Action 6: Click to enable the check box beside each sent message that you want to erase.
Step 7: Click the "Delete Selected" button then click "Delete Messages" in the verification pop-up home window. Facebook eliminates the selected messages.
Tip: To delete a whole conversation, including all received as well as sent messages, click the "Delete All" choice after opening the "Delete Messages" screen.