Write-up your agreement​​ You can use Spousal, Partner, or Family Support Order Attachment (form FL-343) to write out the details of your agreement. Both spouses are required to complete and file their own FL150.It must be filed within 60 days of the initial divorce petition being served. This is the first step to filing for divorce in California. Learn about the kinds of spousal support in California, how judges decide the amount and duration of alimony, and whether you can change the award later. (NOTE: Fill out this page only if your case involves child support.) FL-150. Judicial Council of California. The FL 300 can be used to also ask for a modification of child support. They will take a Certified, Conformed copy of the California judgment and file it in the Florida court. So, if your ex-spouse moves from Florida to California, your Florida child support order is just as enforceable as it was before he or she moved.