my mother in law has my two kids and she has not rights to them and i want them back
Child Custody Lawyer
if she has no rights to them, call the police.
if you are the mom, if there are no court proceedings concerning these children, you do not need a custody paper.
Divorce / Separation Lawyer
Your questions are really insufficient to answer. Go speak with an attorney. Explain why your mother-in-law has your children. Bring any papers you have with you when you speak to the lawyer.