Ignoring the application instructions
Wrong subject line. Missing CVs — yes, applications arrive with no CV attached more often than you'd think. Or the opposite: on my last recruitment campaign, I received more than 400 applications including 100 with over 10 attachments we never asked for.
And then there are the emails with no hello, no text, nothing, just attachments. What do you expect a recruiter to do with that?
Operators use application instructions to filter for one thing: attention to detail. The core skill of the job, tested before the job begins.
