The USGS File List Ordering page allows you to enter Landsat scene lists to see which scenes are currently available for download, which scenes need to be processed, and the scenes that are unavailable.
The USGS File List Ordering page allows the upload of these file types:
A text file displaying one image id per line
Order = Processing is required to create the Landsat Level-1 data product. Processing takes 1 to 3 days, and email confirmation will be sent when the Level-1 product is ready to download.