Need some guidance.

I was told that envelopesNow requires a character trigger on the first page and last page of a document to insert OMR marks. Is that true?

My scenario: I have a couple thousand PDF files. All files vary in page length. Each file is addressed to a single recipient.

I simply want EnvelopesNow to add OMR marks without requiring any character recognition for first page & last page detection. Is this possible?