Sub2 Insurance question

[Curtis H.]

I have posted this in a few forums with no response, but I gotta keep trying as I don't want to make a huge mistake. So here we go again. 

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