You have a lot of evidentiary questions that attys on this forum probably would be loath to attempt to provide info regarding. There may be relevant questions of service regarding your 'receipt' of this civil summons. You should not hesitate to contact an attorney in Indiana to assist you. I have a client who resides in China and altho it is a challenge you can be effectively represented by counsel while you are out of country. Trying it yourself particularly with a complicated matter and you being out of the country is akin to me attempting to launch a space shuttle. Might go well, but highly unlikely.