The damga resmi was a form of stamp duty in the Ottoman Empire. During most of the Tanzimat period, it was one of the more effective sources of revenue. The original form of damga resmi was abolished in 1839 as part of a complex series of tax reforms following the Hatt-i Sharif, but a new type of damga resmi reappeared in 1845. Damga resmi has since been abolished.