Summons from Midland

I recently was summons by Midland, they apparently purchased an old account from Citi Bank. For starters, they left the summons with my 17 yr old daughter and I am not sure if that is legal here in the state of AZ. Currently they are suing me for $2,000, I attemped to find out what the SOL is here and apparently it just changed to 6 years. Which I might add would of qualified this account to be uncollectable in Sep 12. I have done some research and am not stressing out on how to respond to the summons, however I did have a few questions. Prior to this event, I have often thought about bankruptcy and was wondering should I proceed with this route, is this information that would stop the proceedings with Midland or do I still have to appear in court?

17 years of age is legal in AZ http://www.served.com/az.asp

If you do not have a valid defense or fight it, they will get a judgement against you.