How To Delete Sent Message Facebook
Step 1: Check in to your Facebook account.
Step 2: Click the "Messages" switch in the menu on the left to open up the Messages page.
Step 3: Click the conversation that contains the sent messages you want to remove. Facebook presents conversation strings in day order with the most recent at the end of the web page.
Step 4: Click the "Actions" switch at the top of the conversation screen.
Tip 5: Select "Delete Messages" from the pull-down menu.
Step 6: Click to allow the check box next to each sent message that you want to remove.
Step 7: Click the "Delete Selected" switch and then click "Delete Messages" in the verification pop-up window. Facebook gets rid of the chosen messages.
Tip: To erase an entire conversation, including all received as well as sent messages, click the "Delete All" choice after opening the "Delete Messages" screen.