Need help filling out a common child support form? We have videos to help!The Central Depository Child Support and Alimony Office maintains a local Central Depository to receive and process court-ordered payments. Write the letter spelling out the time line and chronicle the events of your child being taken out of state without your knowledge and permission. This is a packet of various forms that may be used to file a simple motion OR an Answer to a Petition. This short video shows you how to complete the form titled the declaration of unpaid support child support. Supplemental Petition for Modification of Child Support. Form Number. 12.905(b). Both parties sign the (Joint) Motion in front of a Notary Public. c. The child is no longer in the household of the Petitioner.