I don't know anything about MO laws but usually when a court order comes from a different state, you want to ask for an 'exemplified' or 'authenticated' copy. It is an extra measure of certification where the clerk certifies that the copy is an exact copy of the order in the file, then there is a section where the judge certifies that the clerk is the actual clerk AND another section where the clerk certifies tha the judge is the judge. (I know, I know...) The child support envorcement agency there in MO may request this to start a case, but if you are going to the trouble to get a copy from Kansas, you might as well get what they need. Once the MO agency files a case, they will likely file a UIFSA, a forein judgment (just from another state) in the mom's state of residence. That way CA has jurisdiction to enforce the original Kansas order. It sounds complicated, but it really is just paperwork. The lawyers in the MO enforcement office do this sort of thing all the time and know exactly what to do, so don't worry...