Douane commonly refers to one of two agencies

Government agency

A government or state agency is a permanent or semi-permanent organization in the machinery of government that is responsible for the oversight and administration of specific functions, such as an intelligence agency. There is a notable variety of agency types...

:

• the French
  France
  The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...
  
   customs and excise agency, the Directorate-general of customs and indirect taxes
  Directorate-general of customs and indirect taxes
  The Directorate-General of Customs and Indirect Taxes is a French law enforcement agency responsible for levying indirect taxes, preventing smuggling, surveilling borders, and investigating counterfeit money...
  
   
• the Dutch
  Netherlands
  The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...
  
   Tax and Customs Administration
  Tax and Customs Administration
  The Tax and Customs Administration is the tax collection and customs service of the government of the Netherlands. Part of the Ministry of Finance, it is responsible for supervising the import, export and transit of goods, detecting fiscal, economic and financial fraud, levying and collecting...
  
   

Douanes were a system of taxation through custom duties in France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

 in King Louis XIV

Louis XIV of France

Louis XIV , known as Louis the Great or the Sun King , was a Bourbon monarch who ruled as King of France and Navarre. His reign, from 1643 to his death in 1715, began at the age of four and lasted seventy-two years, three months, and eighteen days...

's reign. In the singular, it is also the French and Dutch word for customs

Customs

Customs is an authority or agency in a country responsible for collecting and safeguarding customs duties and for controlling the flow of goods including animals, transports, personal effects and hazardous items in and out of a country...

 in the sense of a border check.

The term is derived from the Mughal

Mughal Empire

The Mughal Empire ,‎ or Mogul Empire in traditional English usage, was an imperial power from the Indian Subcontinent. The Mughal emperors were descendants of the Timurids...

 title dewan

Dewan

The originally Persian title of dewan has, at various points in Islamic history, designated various differing though similar functions.-Etymology:...

(also diwan or divan), held by the chief revenue officer of a province, via the chiefly Bengali term diwani

Company rule in India

Company rule in India refers to the rule or dominion of the British East India Company on the Indian subcontinent...

, denoting the right to collect an excise tax on imported goods.