Answered by Mike, Hiring Expert at Avery Dennison Corporation, on Friday, May 13, 2016
I have to say, that is a very odd situation. I know that I have seen or heard my share of odd hiring practices, but this is up there. I would back pedal a bit and reach out to your main point of contact at the company to ask some of the questions you are alluding to: what are the details of the internship, will I be compensated, what are the expectations, etc? If you can't get a straight answer or are still feeling unsure, ask for the HR department assigned to that team and try doing some digging there. Often times, you might find an HR rep that is partnered with that team that could help gather that information for you.
But, if you still can't seem to get a good understanding of what is going on, I would consider exploring other opportunities. If the team you are interviewing with can't follow up or explain some basics of the role, it's probably a good indicator of the quality of work you would be dealing with there.
In summary, try to get someone on the phone and ask those questions directly. If you can't seem to get a good response, tread carefully, or (better yet), find a new opportunity.