CGT advice on property

Hi,

I have a house that i purchased late in 2010 and lived in for the best part of a year while I updated it. Then I rented it out and it is still rented out. During the time I was living there I had I left my mail being delivered to a family members place that I had been living at for a couple of years prior to buying the house and moving in. After some time I decided to move back to the place I was in previously (with the family member).

So all up I lived in my house approx 10 months after buying it and moving in.

Now i'm looking at selling and I'm wondering what evidence I need to provide the ATO that I lived there. Since I never bothered changing my mailing address (it was close by and no problem collecting the mail) it stayed as my previous (and now current address) I have bills etc. that were for utilities, rates etc. at my own property and in my name but were sent to my mailing address at the other property e.g:

My property that I own, lived in, and now rent out is in Kensington, and I know live at a family members place at Baxter.

Bills for my Kensington property while I lived there were labeled as (example):

AGL Electricity

Christos Jones

Service Address: Kensington

BUT they were mailed to me at Baxter.

So my question is, do these bills still stand as evidence that I lived at Kensington as far as the ATO is concerned? What I want to do is get the CGT benefit of this property having been a residence at some point in the previous 6 years. Had I known about the possible implications at the time I would have changed my mailing address to my Kensington property but I was oblivious about this issue at the time.

What evidence does the ATO require as proof that someone lived at a property at a given time?

Hope someone can clarify.

Thanks

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