Why is my ex boyfriend asking me for this?

We split up in end of September because he broke it off and I found out he was cheating on me and he ended up getting this girl pregnant. No contact for about 2 months since we last seen each other (just had sex) Now he is asking if I still have a copy of our old lease because he needs "proof that he lived other than his parents last year for the IRS" tax stuff I guess... either that or he's signing another lease somewhere with this girl. Why is he asking me for a copy of the old lease when he could just ask our old landlord/duplex for a copy or a letter? Is this an excuse to try and see me? I'd like you're opinion. Thanks