In a digital marking system every single item has its own code, and its movement from production to sale is recorded. That data is matched against documents and fiscal receipts.
So mistakes are costly: an unscanned code, a box received incorrectly or a quantity typed by hand creates a mismatch in the system that takes time to fix. The best protection is to scan the code at every step and avoid manual entry.
Reliable scanners, good print quality and trained staff noticeably reduce errors. Check the exact requirements in official sources; BDB helps equip the process.