This study aims to shed light on forgery coinage during the Abbasid period in general, and the time of Caliph al-Nāṣir li-Dīn Allah in particular, through forgery dinar in the name of Caliph al-Nāṣir li-Dīn Allah minted in Madīnat al-Salām 616 AH, and this is contemporary forgery, not modern. This dinar is a rare dinar due to the nonspread of forgery during that period.This research includes the study and publication of another non–forgery dinar in the name of Caliph al-Nāṣir li-Dīn Allah minted in Madīnat al-Salām 616 AH, These two dinars are published and studied in this research for the first time.