The latter were withdrawn soon afterwards upon the establishment of the Provisional Government, but the former continued to issue revenue stamps until the late 20th century.
Most Northern Irish revenue stamps were British key types with appropriate inscriptions, but there were a number of different issues as well.
In 1921, stamps were issued for Bankruptcy, Civil Service, Companies Registration, Contract Note, County Courts, Estate Duty, Foreign Bill, Judicature, Land Commission, Land Registry, Official Arbitration, Petty Sessions (including overprints for Dog Licence) and Registration of Deeds.
Upon decimalization in 1971, stamps were issued for Bankruptcy, Contract Note, County Court, Dog Licence, Judicature Fee, Land Registry, Petty Sessions and Registration of Deeds.
[2] A number of impressed duty stamps were used in Northern Ireland, including both general-duty issues and those for specific purposes.