How to Attach Documents to a Facebook Message
Facebook users can now send Microsoft Word, Excel and PowerPoint documents as attachments in Facebook messages. To download, edit and save Facebook attachments, users must have Microsoft Office installed on their computers. Those who don't can still view Facebook attachments via Office Web Apps, an online-only document viewer created by Microsoft.
Log in to your Facebook account.
Click on "Messages" in the toolbar on the left side of the screen.
Click on "New Message" in the top right corner of the screen.
Type the email address of the person you want to send an attachment to in the "To:" text field. Alternatively, if the person you are sending the attachment to is one of your Facebook friends, you can type the person's name in this field.
Type the content of your message in the "Message:" text field.
Click on the paper clip icon to attach a document to the message.
Locate your document in the pop-up dialogue box.
Double-click on the document to attach it to your message.
Click on the "Send" button in the bottom-right corner of the message box.