Uniform Child Custody Jurisdiction and Enforcement Affidavit. Form Number. 12.902(d).After you have completed the forms and have signed and notarized them, make 2 complete copies of everything you have signed (one copy is for your records). Child Support Forms ; 4-3a. Petition (Commissioner). The Form C is only for use in Child Support cases involving Child Support Enforcement (the Department of Revenue). Read the instructions carefully on each form! How do I best complete an affidavit to support a friend who is seeking custody of her child? A friend of mine is going through a divorce. These are the official forms for use in Family Court proceedings.