**Background**: I am writing a MSc dissertation in a technology/business-related topic.  I interviewed 15 people for about an hour each.  Each interviewee was given a choice of anonymity (e.g. tech-sector employee), organisation only (e.g. Microsoft employee) or named (Joe Bloggs of Microsoft).  Most went for named; although in the final version of the text when I referred to interviews I just used organisations (mostly for presentational reasons).

**Question**: Is it considered polite to include the interviewees in the acknowledgements (clearly just those happy to be named)?  If I did so I would probably email first to check they were happy (and I'd got their name/title right!); although might be overthinking this...