This thing happens in the USA. I am working as a R&D research engineer in the industry, not academia.
Recently, our group recruited a research scientist, and we finally made an offer to a guy. In this guy's resume, he claimed his title/position as "Senior Research Associate" for his previous job in a university. However, after doing the background check, we found this guy's real title for his previous job is "Postdoc." His salary is a public record, and it showed us his salary is a regular salary for the Postdoc in the USA
The background team pointed this out to us. So I wonder if this title problem is a big deal? To our job review team, we don't really care about the title, and "Postdoc" or "Research Associate" are same to us, we care about applicants' research experience and competence.
I don't wanna make people feel that I am making a mountain out of a molehill. But in my opinion, I believe resume should be accurate and honest for all the experience and titles, and sometimes a resume is even considered a legal document. I wonder how the community think of this