Modern Problems How to Spot an Intentionally Damaged File?

Hi everyone, as someone who manages a high-vibe boutique with a lot of international contractors, I’ve started seeing some very strange "file errors" lately. A few times this month, I’ve received attachments that look perfect but simply refuse to open. I’m starting to wonder if people are using a Files Corrupter to hide the fact that they haven’t actually finished the work yet. Does anyone know a high-quality way to tell the difference between a natural technical glitch and a curated, intentional corruption? I want to keep my business professional and established without being unfairly suspicious of my hardworking team. Thanks in advance.