Texas Affidavit of Domicile Form. Use our Affidavit of Domicile form to verify the last home address of a deceased person to speed up the inheritance process.How to fill out the Affidavit of Domicile Form Instructions? 1. Obtain the Affidavit of Domicile form. 2. All you have to do is fill out our easy-to-understand questionnaire. An affidavit of domicile is a sworn statement signed before a notary public establishing the legal domicile of someone who has died.