All newly appointed and reappointed notaries should register. Where Do I Register?General Witness Affidavit(PDF, 465KB) - Must be filed at our office; varied uses (e.g. Executor death, witness death). Allegheny County Certificate of Trust Form. Fill in the blank form formatted to comply with all recording and content requirements. Fill out the form on this page to request a notary appointment. How to fill out the Affidavit for Caste Certificate Application? 1. Download the affidavit form. 2. Use the form with the boxes to guide you through filling out the blank form.