You might want to try out other OCR engines as well (the Digitize Document activity requires one, in case it needs to use it). Free options besides Tesseract OCR are
- Microsoft OCR (available by default in the UiAutomation package)
- OmniPage OCR (available in the UiPath.OmniPage.Activities package)
Depending on the quality of the documents, I recommend you play around with them (do try out Profile.None or Profile.Scan for OCR settings, as one of these might work better in your case) and based on your use case decide which works best for you.