Yes - but there are complexities to automating the process. At the moment I would suggest saving the PDF's in a known Folder with the customer number as part of the document name. Then, save the Folder and document name in the "Additonal Comments" section of the Customer notes, or use an optional field for the Document name (on the assumption that all these PDF's will be in the same Folder).

Are you scanning a completed piece of paper, or receiving the credit applications electronically?