Insurance on a Sub2

[Curtis H.]

Hi all, 

I am about to get insurance on a property I got Sub2 that I ended up living in. I know that I should add the previous owner as an additional insured on the policy, but when the insurance company asks why and who is this person, what do I say?

Lastly, they are naturally asking for the mortgage company's information, loan number, etc. Do I willingly give that info to them as I don't really want them to send too many notifications to the bank. 

Any advice is appreciated. 

Thanks, 

Curtis