Grandmother Guardian >6 yrs...

My daughter signed 2 of my grandchildren over to me in 2003 and subsequently signed a waiver knowing I was filing to obtain formal guardianship/custody. I obtained the guardianship papers from Arkansas and with the courts permission, moved to Arizona this year. The kids are now 12 and 7. I received a call today from a process server with papers from an attorney in Arkansas wanting to meet me to serve the papers. The process server gave me the attorney's name and number in Arkansas. 1) Do I have to accept the papers? 2) Shouldn't my daughter have to come to Arizona if she wants to try to 'quit the guardianship' (process servers terminology)? 3) Is there something simple I can do here to turn the situation to mine and the kid's favor, i.e. send the Arkansas court papers indicating we live in Arizona, etc?
My daughter, the childrens' mother, had drug problems and run-ins with the law and is still on probation due to a felony during the previous years. I don't look forward to a court battle but would obviously prefer NOT to have to go back to Arkansas since the kids and I live in Arizona.

You can object if the kids have been there over six months. The court may agree with you.
And if the Ark. court matter proceeds you can ask to appear by phone and have the matter transferred to AZ.