2nd house vs. investment property

[Jonathan Craig]

I've been looking at a 2nd investment property finance options here recently and some of answers I've gotten have made me feel uneasy.  At least two different loan officers have told me to file my application for a 2nd home versus a investment property.  According to one officer,  I only need to live in it for 15 days according to FanniMae and I can rent it out.  From everything I've read, this is mortgage fraud.  Both of them have told me this is standard practice because what you decide to do with your property is your business.  Thoughts?