All Acknowledgments must comply with the Act. These forms will be useful when filing required documents related to estates of deceased or incapacitated persons.There must be a Social Security Number, if available, in the birth mother's and birth father's sections of the Acknowledgment of. File this form in the office where legal pleadings are filed. Letter of Recogition. Acknowledgement of Paternity forms are used to establish paternity of a child. Complete all three pages of Notice to Defend and Divorce Complaint using the detailed. "Instruction for Forms" as a guide. 2.