The research highlights some aspects of the mysterious economic life of some traders, such as the financial situation or some financial crises experienced by some traders. which published for the first time, these letters and correspondences were exchanged between traders and partners, and they were often written and sent weekly to receive a reply. If there were no reply to them, the merchant sends another letter to inquire about the reason for the lack of response, saying: "Lam Oqer Lak Ketab Hazahel Joma'a", meaning (I have not received your correspondence this week). It also sheds light on their activities and commercial transactions during the period under study. The current text is one of these correspondences. It is a business letter related to some trade affairs from a merchant to his partner, namely: Ibrahim bin Habib.... and Abu Ishaq Ibrahim bin...Although the text is undated, this letter can be dated based on the calligraphy and writing style to the third century AH / ninth century AD.