Define "Investment property"? Using 2nd home mort for Air Bnb

[Jason Wiser]

I am in the 11th hour leading up to clear to close. My bank just  sent me an email telling me that the underwriter wants me to sign and date something that says I will not use this property as an investment property. 
We are using this property as a second home and a vacation property, but still want to AirBnB to help offset cost of mortgage and repairs. 
Will I be committing fraud if I state that I will not use as "Investment property" and then list it on AirBnB? 

What can I do?

[Joe C.]

Ask them for a written definition of what they mean by "investment property".