Yea,had this happen to me about 5 years ago.Some insurance co's don't exactly understand what your doing so they send someone out to watch so they have a better understanding of exactly what risk they are underwriting.Although in my opinion this could mean the insurance co. you chose may not be the best option for tree service insurance just because the policy may not be as extensive as a policy through a company that understands tree work.Just something to think about.