This classic Chile 1918 provisional postage due stamp features the bold “Habilitado 1918” overprint applied to earlier Deficiente (postage due) issues during a period of postal rate adjustment and stamp shortages. Issued under the Unión Postal Universal (UPU) framework, the stamp was used to collect insufficient postage fees from recipients. The brown engraved design with central star emblem reflects early 20th-century Chilean fiscal-postal aesthetics. Provisional overprints like this are highly collectible due to their limited usage period and multiple print varieties. A desirable item for collectors specializing in Latin American postal history and postage due issues.