Del. Code tit. 24, § 5608

Upon appointment, the Board shall issue to each constable a commission and the constable so appointed shall, before acting or performing duties as a constable, take and subscribe, before any officer authorized by the laws of this State to administer oaths, the oath or affirmation prescribed by § 1 of Article XIV of the Constitution of Delaware. The oath or affirmation shall not be recorded at the recorder of deeds.