FAQ Can I print my CASS Form or Postage Statement to a file? You can print your CASS Form 3553 and your Postage statement to a file. When you click on the print button a print dialogue window will appear before you click on ok to print. You will see a radio button called “Print to file”. Put a check in this box and your Cass Form or Postage Statement will print to a .PRN file.