An affidavit of heirship is a legal document used to establish the heirs of a deceased person when there's no will. A Will can be submitted for safekeeping in the Probate Department.Please contact our Probate Department at 713-274-8585 for further information. Affidavit of Heirship to identify heirs of a deceased home owner. All fields are required unless indicated otherwise. 2. It becomes effective as of the date signed. The individuals who complete the affidavit can not receive any financial benefit for completing the form. Like an affidavit of heirship, it may be used when there is no will, or the property was left out of the will. All statements in the affidavit require accurate factual representation to maintain legal integrity. The documentation may include a death certificate, court order, and other legal documents that confirm the successor's heirship rights.