Scanned Letter of Recommendation versus Saved as PDF Question from my professor : 

While filling in a request for Recommendation Letter, portal said 


  Please upload PDF File. Do not print recommendation and scan as PDF


My professor had printed the letter on college letterhead, signed it, scanned and saved as PDF well in advance.
And now he is confused about what should be done.

Kindly advise
1. Upload the Scanned PDF
2. Save the letter from docx to PDF and upload. This document won't have letterhead or the signature.

I was under the impression that most universities use OCR to process letter, hence scanned documents would suffice.
The instructions seem simple enough for your professor to follow. However, if still in doubt, you could contact the University concerned and see if you could come to a conclusion regarding this matter.